Case studies

At Heatforce, we’re committed to helping our customers achieve significant savings through renewable energy solutions. Whether it’s Solar PV, Heat Pump installations, or EV Charging Stations, we have a proven track record of delivering cost-effective and energy-efficient systems.

Read on to learn how we’ve helped homes and businesses lower their energy bills and reduce their carbon footprint.

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client

Welsh Ambulance Service NHS Trust

Project Type

Decarbonisation of an active emergency service hub: replacement of failing gas boilers with Air Source Heat Pump (ASHP), Solar PV and Battery Energy Storage System (EESS), delivered with zero operational downtime.

Measures / Technologies

Air Source Heat Pump (ASHP) — communal heating system, 45°C design flow temperature
Solar PV — roof-mounted, sized to offset ASHP electrical demand
Battery Energy Storage System (EESS) — 20kW
Gas boiler decommissioning and pipework upgrade
Heat emitter replacement and increased insulation
DNO G99 application and approval
SolarEdge fireman's gateway (full system shutdown for emergency safety)

Form of Contract

Turnkey design-and-install contract — single-site direct award.

Bid Alignment

Public sector / NHS / Blue Light Services — decarbonisation of mission-critical operational estate.

Value

£160,000 (turnkey, completed within budget — no overruns).

Scheme Size

1 site (Tredegar Ambulance Station, NP22 4NP — Blaenau Gwent).

Location

Tredegar, Blaenau Gwent, South Wales (NP22 4NP).

Start Date

January 2025

end Date

April 2025 (3-month delivery; minor agreed extension to install second mansafe fall arrest system).

Project Highlights

Flagship for sustainable emergency infrastructure in Wales.
c.50% carbon emissions reduction.
£160k delivered to budget with no overruns.
Zero accidents or incidents.
100% operational availability of ambulance egress/access throughout the 3-month delivery.

Innovation / Value Add

Integrated ASHP/PV/battery synergy design, with the battery sized to offset ASHP electrical demand and maximise self-consumption of solar generation.

SolarEdge fireman’s gateway enables full system shutdown in emergencies.

Cloud-based monitoring interface provides real-time visibility of generation and savings.

“Blue-Light Protocol” developed and standardised for replication across other NHS sites.

Outcomes / KPI's Achieved

Project completed on time within £160,000 budget.
Zero accidents or incidents.
100% operational uptime maintained throughout.
G99/DNO and MCS certification achieved on first attempt.
c.50% carbon reduction achieved post-commissioning.
100% positive feedback in the post-installation survey from the station manager and crew.

Key Challenges, Solutions and Lessons Learned

Challenge: 24/7 active emergency operation.
Solution: Phased delivery with temporary heating skid and “Blue-Light Protocol” to ensure zero downtime.

Challenge: Roof structural integrity and waterproofing.
Solution: Bespoke Nicholson non-ballasted mounting system following the pre-installation structural survey.

Tredegar Ambulance Station — Communal Heating, ASHP, Solar PV and Battery Storage

CEN was commissioned to design, supply and install a Solar PV, battery storage and Air Source Heat Pump system at Tredegar Ambulance Station, replacing a failing gas-fired plant. The site is an active 24/7/365 emergency hub for the Welsh Ambulance Service NHS Trust, demanding zero interruption to power, heating, vehicle readiness or staff welfare.

CEN delivered a £160,000 turnkey solution between January and March 2025, with the system formally commissioned and handed over in April 2025. The integrated ASHP–Solar PV–battery design provides a c.50% reduction in carbon emissions and gives the Trust long-term protection against rising energy costs, freeing budget for frontline patient care.

Initial Scoping / Feasibility and Design

Pre-installation structural survey identified the need for a bespoke Nicholson non-ballasted mounting system to protect roof integrity and waterproofing.

Thermal modelling and load profiling identified that a “replacement-only” approach was insufficient. The integrated ASHP/PV/battery synergy was specifically designed so the battery offsets ASHP electrical demand.

Heat-loss calculations confirmed the 45°C flow temperature requirement and the consequent need for upgraded heat emitters and insulation.

Funding

Self-funded by Welsh Ambulance Service NHS Trust as a capital decarbonisation project.

CEN supported the Trust through DNO G99 application and approval (required because system capacity exceeded thresholds for standard connection).

Specialist Co-ordination

Co-ordination across MCS-accredited heat pump installers, NICEIC-approved electricians, structural engineer for roof load validation, scaffolding partner, and the SolarEdge fireman’s gateway specialist.

Approach to Appointment

Single Contracts Manager appointed as the client’s single point of contact.

Specialist roles included Design & Compliance Lead, Structural Engineer, Senior Installation Manager and six MCS-accredited installers.

All sub-contractors held current accreditations and were inducted to the site’s “Blue-Light Protocol”.

Programme Delivery

Phased delivery model maintained the station “live” throughout.

A temporary heating skid maintained hot water and climate control during boiler removal (“Zero-Interruption Switchover”).

Daily Gantt-linked cost tracking and weekly variance review meant the project completed on programme and on budget.

Programme Scheduling

Detailed timeline with task dependencies.
Weekly milestone reviews.
Adaptive resequencing where minor delays arose.
High-noise and decommissioning works coordinated around shift patterns to avoid disrupting resting crews or dispatch operations.
Daily on-site check-ins resolved bottlenecks promptly.

Client Engagement

Daily in-person briefings with the Station Manager and email notifications via the on-site manager.
"Blue-Light Protocols" established for the site, including exclusion zones, segregated delivery and access zones, and tailored on-site conduct expectations.
KPI reporting captured operational uptime, technical compliance and user-support performance.
Weekly progress reports issued to NHS Estates.

Resident Engagement

CDM

External Parties

Compliance & Relevant Certifications

MCS
CPS
BS 7671 Electrical Regulations
Building Regulations
ISO 9001
ISO 14001
ISO 45001
G99/DNO
NICEIC
Gas Safe
PAS 2030/2035 (where applicable)

client

Welsh Ambulance Service NHS Trust

Project Type

Measures / Technologies

Air Source Heat Pump (ASHP) — communal heating system, 45°C design flow temperature
Solar PV — roof-mounted, sized to offset ASHP electrical demand
Battery Energy Storage System (EESS) — 20kW
Gas boiler decommissioning and pipework upgrade
Heat emitter replacement and increased insulation
DNO G99 application and approval
SolarEdge fireman's gateway (full system shutdown for emergency safety)

Form of Contract

Turnkey design-and-install contract — single-site direct award.

Bid Alignment

Public sector / NHS / Blue Light Services — decarbonisation of mission-critical operational estate.

Value

£160,000 (turnkey, completed within budget — no overruns).

Scheme Size

1 site (Tredegar Ambulance Station, NP22 4NP — Blaenau Gwent).

Location

Tredegar, Blaenau Gwent, South Wales (NP22 4NP).

Start Date

January 2025

end Date

April 2025 (3-month delivery; minor agreed extension to install second mansafe fall arrest system).

Project Highlights

Flagship for sustainable emergency infrastructure in Wales.
c.50% carbon emissions reduction.
£160k delivered to budget with no overruns.
Zero accidents or incidents.
100% operational availability of ambulance egress/access throughout the 3-month delivery.

Innovation / Value Add

Integrated ASHP/PV/battery synergy design, with the battery sized to offset ASHP electrical demand and maximise self-consumption of solar generation.

SolarEdge fireman’s gateway enables full system shutdown in emergencies.

Cloud-based monitoring interface provides real-time visibility of generation and savings.

“Blue-Light Protocol” developed and standardised for replication across other NHS sites.

Outcomes / KPI's Achieved

Project completed on time within £160,000 budget.
Zero accidents or incidents.
100% operational uptime maintained throughout.
G99/DNO and MCS certification achieved on first attempt.
c.50% carbon reduction achieved post-commissioning.
100% positive feedback in the post-installation survey from the station manager and crew.

Key Challenges, Solutions and Lessons Learned

Challenge: 24/7 active emergency operation.
Solution: Phased delivery with temporary heating skid and “Blue-Light Protocol” to ensure zero downtime.

Challenge: Roof structural integrity and waterproofing.
Solution: Bespoke Nicholson non-ballasted mounting system following the pre-installation structural survey.

Tredegar Ambulance Station — Communal Heating, ASHP, Solar PV and Battery Storage

Initial Scoping / Feasibility and Design

Pre-installation structural survey identified the need for a bespoke Nicholson non-ballasted mounting system to protect roof integrity and waterproofing.

Heat-loss calculations confirmed the 45°C flow temperature requirement and the consequent need for upgraded heat emitters and insulation.

Funding

Self-funded by Welsh Ambulance Service NHS Trust as a capital decarbonisation project.

CEN supported the Trust through DNO G99 application and approval (required because system capacity exceeded thresholds for standard connection).

Specialist Co-ordination

Approach to Appointment

Single Contracts Manager appointed as the client’s single point of contact.

Specialist roles included Design & Compliance Lead, Structural Engineer, Senior Installation Manager and six MCS-accredited installers.

All sub-contractors held current accreditations and were inducted to the site’s “Blue-Light Protocol”.

Programme Delivery

Phased delivery model maintained the station “live” throughout.

A temporary heating skid maintained hot water and climate control during boiler removal (“Zero-Interruption Switchover”).

Daily Gantt-linked cost tracking and weekly variance review meant the project completed on programme and on budget.

Programme Scheduling

Detailed timeline with task dependencies.
Weekly milestone reviews.
Adaptive resequencing where minor delays arose.
High-noise and decommissioning works coordinated around shift patterns to avoid disrupting resting crews or dispatch operations.
Daily on-site check-ins resolved bottlenecks promptly.

Client Engagement

Daily in-person briefings with the Station Manager and email notifications via the on-site manager.
"Blue-Light Protocols" established for the site, including exclusion zones, segregated delivery and access zones, and tailored on-site conduct expectations.
KPI reporting captured operational uptime, technical compliance and user-support performance.
Weekly progress reports issued to NHS Estates.

Resident Engagement

CDM

External Parties

Compliance & Relevant Certifications

MCS
CPS
BS 7671 Electrical Regulations
Building Regulations
ISO 9001
ISO 14001
ISO 45001
G99/DNO
NICEIC
Gas Safe
PAS 2030/2035 (where applicable)

client

Welsh Ambulance Service NHS Trust

Project Type

Measures / Technologies

Air Source Heat Pump (ASHP) — communal heating system, 45°C design flow temperature
Solar PV — roof-mounted, sized to offset ASHP electrical demand
Battery Energy Storage System (EESS) — 20kW
Gas boiler decommissioning and pipework upgrade
Heat emitter replacement and increased insulation
DNO G99 application and approval
SolarEdge fireman's gateway (full system shutdown for emergency safety)

Form of Contract

Turnkey design-and-install contract — single-site direct award.

Bid Alignment

Public sector / NHS / Blue Light Services — decarbonisation of mission-critical operational estate.

Value

£160,000 (turnkey, completed within budget — no overruns).

Scheme Size

1 site (Tredegar Ambulance Station, NP22 4NP — Blaenau Gwent).

Location

Tredegar, Blaenau Gwent, South Wales (NP22 4NP).

Start Date

January 2025

end Date

April 2025 (3-month delivery; minor agreed extension to install second mansafe fall arrest system).

Project Highlights

Flagship for sustainable emergency infrastructure in Wales.
c.50% carbon emissions reduction.
£160k delivered to budget with no overruns.
Zero accidents or incidents.
100% operational availability of ambulance egress/access throughout the 3-month delivery.

Innovation / Value Add

Integrated ASHP/PV/battery synergy design, with the battery sized to offset ASHP electrical demand and maximise self-consumption of solar generation.

SolarEdge fireman’s gateway enables full system shutdown in emergencies.

Cloud-based monitoring interface provides real-time visibility of generation and savings.

“Blue-Light Protocol” developed and standardised for replication across other NHS sites.

Outcomes / KPI's Achieved

Project completed on time within £160,000 budget.
Zero accidents or incidents.
100% operational uptime maintained throughout.
G99/DNO and MCS certification achieved on first attempt.
c.50% carbon reduction achieved post-commissioning.
100% positive feedback in the post-installation survey from the station manager and crew.

Key Challenges, Solutions and Lessons Learned

Challenge: 24/7 active emergency operation.
Solution: Phased delivery with temporary heating skid and “Blue-Light Protocol” to ensure zero downtime.

Challenge: Roof structural integrity and waterproofing.
Solution: Bespoke Nicholson non-ballasted mounting system following the pre-installation structural survey.

Tredegar Ambulance Station — Communal Heating, ASHP, Solar PV and Battery Storage

Initial Scoping / Feasibility and Design

Pre-installation structural survey identified the need for a bespoke Nicholson non-ballasted mounting system to protect roof integrity and waterproofing.

Heat-loss calculations confirmed the 45°C flow temperature requirement and the consequent need for upgraded heat emitters and insulation.

Funding

Self-funded by Welsh Ambulance Service NHS Trust as a capital decarbonisation project.

CEN supported the Trust through DNO G99 application and approval (required because system capacity exceeded thresholds for standard connection).

Specialist Co-ordination

Approach to Appointment

Single Contracts Manager appointed as the client’s single point of contact.

Specialist roles included Design & Compliance Lead, Structural Engineer, Senior Installation Manager and six MCS-accredited installers.

All sub-contractors held current accreditations and were inducted to the site’s “Blue-Light Protocol”.

Programme Delivery

Phased delivery model maintained the station “live” throughout.

A temporary heating skid maintained hot water and climate control during boiler removal (“Zero-Interruption Switchover”).

Daily Gantt-linked cost tracking and weekly variance review meant the project completed on programme and on budget.

Programme Scheduling

Detailed timeline with task dependencies.
Weekly milestone reviews.
Adaptive resequencing where minor delays arose.
High-noise and decommissioning works coordinated around shift patterns to avoid disrupting resting crews or dispatch operations.
Daily on-site check-ins resolved bottlenecks promptly.

Client Engagement

Daily in-person briefings with the Station Manager and email notifications via the on-site manager.
"Blue-Light Protocols" established for the site, including exclusion zones, segregated delivery and access zones, and tailored on-site conduct expectations.
KPI reporting captured operational uptime, technical compliance and user-support performance.
Weekly progress reports issued to NHS Estates.

Resident Engagement

CDM

External Parties

Compliance & Relevant Certifications

MCS
CPS
BS 7671 Electrical Regulations
Building Regulations
ISO 9001
ISO 14001
ISO 45001
G99/DNO
NICEIC
Gas Safe
PAS 2030/2035 (where applicable)

client

YnNi Teg Cymru with Bengal Dragons Foundation

Project Type

Turnkey design and installation of integrated Solar PV, battery storage and immersion-diverter systems across four mosques in South Wales, including roof and electrical safety remediation, delivered with full respect for prayer schedules and community use.

Measures / Technologies

Solar PV — roof-mounted across four sites, total >52kW installed capacity
Battery Storage — lithium-ion, total 81kWh across portfolio
Immersion diverters — divert excess solar to hot water cylinders for ablution (Wudu) and cleaning facilities
Roof inspection and remediation (structural integrity prior to installation)
Electrical safety upgrades (single-phase redesign where dual supply, undersized fuses, unsafe legacy wiring identified)
G99/DNO applications managed by CEN
Lithium-ion battery banks sized to maximise self-consumption during evening prayer times

Per-mosque installed capacity:

Combined:

Equipment Specification:

JA Solar JAM54D40-450-LBBF mono N-type modules
GivEnergy 3-phase Gen 3 Hybrid Inverter
GivEnergy 20.4kWh modular battery storage
Renusol Varisole mounting system
Renusol FS10+ flat roof mounting
Nicolson Rooftrak mounting system
MyEnergi Eddi immersion controller
Iskra IE.7-CT smart generation meter
BENY Fireman's Gateway safety switch

Form of Contract

Turnkey design-and-install contract — single bundled programme across four sites.

Tender provenance:

“Phase 1 BDF” Pricing Schedule issued by Ynni Teg Cyfyngedig on 8 January 2025.

The original tender covered seven mosques. Four progressed to signed contract and delivery. The remaining three did not proceed under Phase 1.

Bid Alignment

Community / Faith-Based Organisations (Places of Worship — Third Sector / Non-Profit).

Renewable energy for live community hubs.

Funder:

Welsh Government’s Ynni Cymru agency (capital grant).

Grant administered by Ynni Teg Cyfyngedig (Fair Energy Ltd) on behalf of the Bengal Dragons Foundation.

Funding conditional on works completion by 28 March 2025

Value

£147,000 across the four sites (turnkey, completed within budget).

Per-mosque contract values:

Iqra Mosque: £32,658.19
Madni Mosque: £36,496.55
Shahporan Mosque: £37,274.98
Dar-ul-Isra Mosque: £35,446.55

Four-mosque subtotal:

£141,876.27

5% contingency:

£7,093.81

VAT:

0% (charitable institutions).

Scheme Size

Four mosques in South Wales (Newport and Cardiff).

Combined portfolio:

Over 50kW Solar PV
Over 80kWh Battery Storage

Location

Newport and Cardiff, South Wales.

Lead contact site:

Madni Masjid

1A Dalcross Street

Cardiff

CF24 4SE

Project locations:

Iqra Mosque and Community Centre
Madni Mosque
Shahporan Mosque
Dar-Ul Isra Mosque

Start Date

Early 2025.

Contracts signed February 2025.

Site mobilisation and scaffolding commenced mid-March 2025.

Installation programme commenced 19 March 2025.

end Date

May 2025 (3-month duration).

Substantive completion:

End May 2025.

Formal handover packs completed simultaneously across all four mosques on 11 June 2025.

Commissioning:

Shahporan Mosque — 3 June 2025
Iqra Mosque — 4 June 2025
Madni Mosque — 10 June 2025
Dar-Ul Isra Mosque — 24 June 2025 (re-issued 9 July 2025)

Formal handover delivered on 11 June 2025.

Project Highlights

First phase of the Gwyrdd Bangla Project, delivering renewable energy systems across four South Wales mosques.
More than 52kW of Solar PV and 81.6kWh of battery storage installed across the portfolio.
Significant electrical safety issues identified and rectified before installation, including dual electrical supplies, undersized fuses and unsafe legacy wiring.
Works successfully delivered around active places of worship while maintaining access for daily prayers, Friday Jumu'ah services and community activities.
Programme completed within budget and within the planned delivery period.

Innovation / Value Add

The battery systems were sized to maximise self-consumption during evening prayer periods when electrical demand is highest.

Immersion diverters were integrated to utilise surplus solar generation for hot water used in ablution (Wudu) and cleaning facilities.

Site-specific engineering solutions included:

Relocating Solar PV arrays where asbestos roofing was identified.
Redesigning dual-phase electrical supplies to single-phase where required.
Specialist Nicolson Rooftrak mounting systems for Fatra membrane roofs.
Discreet cable routing to preserve building aesthetics.
Alternative electrical layouts to avoid damaging decorative internal finishes.

The programme also demonstrated the ability to coordinate specialist roofing, electrical and renewable energy teams simultaneously across multiple live community buildings.

Outcomes / KPI's Achieved

Four South Wales mosques successfully completed.
More than 52kW of Solar PV installed.
81.6kWh of battery storage installed.
Electrical safety issues identified and fully remediated before commissioning.
Approximately 95% of generated solar electricity consumed on-site.
Programme delivered within budget.
Works completed with no disruption to daily prayer services.
Positive feedback received from mosque committees for respectful planning and delivery.

Key Challenges, Solutions and Lessons Learned

Challenge: Existing electrical installations varied significantly between the four mosques, including dual electrical supplies, undersized fuses and legacy wiring.

Solution: Each site underwent detailed pre-installation surveys, with electrical infrastructure upgraded before renewable technologies were installed.

Challenge: Delivering works within live places of worship.

Solution: Activities were carefully programmed around the five daily prayer times, Friday Jumu’ah services and community events, with high-impact works paused before the Adhan and safe access maintained throughout.

Challenge: Different roof constructions across the portfolio.

Solution: Site-specific mounting systems and installation methods were selected, including specialist Nicolson Rooftrak systems and Fatra-certified installers where required.

Lesson Learned: Early technical surveys and flexible programme sequencing were essential to maintaining delivery across multiple live community sites while accommodating unforeseen remedial works.

Social Value / Environmental Contributions

The programme supports community organisations by reducing long-term energy costs and carbon emissions while improving energy resilience across four places of worship.

Renewable energy generation helps lower operational costs, allowing community organisations to redirect resources towards local services and activities.

The installations also provide long-term environmental benefits through increased self-consumption of renewable electricity and reduced reliance on grid energy.

Solar PV and Battery Storage across Four Mosques (South Wales) — YnNi Teg Cymru with Bengal Dragons Foundation

CEN delivered a turnkey programme across four South Wales mosques for YnNi Teg Cymru with the Bengal Dragons Foundation, installing Solar PV and battery storage engineered to reduce operational costs and carbon footprints for community-focused organisations.

Each site is a live place of worship requiring careful sequencing around the five daily prayer times, Friday Jumu’ah services, community events and cultural sensitivities.

CEN identified and remediated significant electrical safety issues (dual supplies, undersized fuses, unsafe legacy wiring) at three of the four mosques before installation could proceed safely.

The contract value was £147,000, delivered within a 3-month duration ending May 2025.

Tender context: the works were procured through the “Phase 1 BDF” Pricing Schedule issued by Ynni Teg Cyfyngedig in January 2025. The tender invited prices for seven South Wales mosques; four (covered by this case study) advanced to signed contract and delivery.

Contracts signed February 2025, installation programme commenced 19 March 2025, substantive completion end May 2025, formal handover across all four sites on 11 June 2025.

Building background (per ITT Appendix 1 site notes):

Iqra Mosque was previously a social club house.
Madni Mosque was previously a vehicle garage repair shop.
Dar-Ul Isra Mosque was previously a residential property.

All sites were adapted in piecemeal fashion for community use, with varying roof construction and electrical systems requiring detailed pre-installation survey.

Initial Scoping / Feasibility and Design

Pre-installation surveys identified:

Asbestos roof at Shahporan Mosque (panels relocated to slate roof to mitigate risk)
Dual-phase electrical supply at Shahporan (redesigned to single-phase)
Fatra warm-deck system at Dar-ul-Isra (specialist Fatra-certified welders apportioned)
Cable routing planned discreetly at Iqra Mosque to preserve building aesthetics
Alternative sub-board location identified at Madni Masjid to avoid drilling through a decorative solid marble wall.

Hot-water tank specification per site (from ITT Appendix 1, used to size the Myenergi Eddi solar-linked immersion controllers):

Roof types:

Funding

Self-funded by YnNi Teg Cymru with Bengal Dragons Foundation as a community renewables programme.

CEN supported with G99/DNO applications where solar capacity exceeded standard thresholds, including managing revised applications during design changes.

VAT treatment:

Contracts zero-rated under the charitable-institution treatment per HMRC rules, confirmed on the Phase 1 BDF Pricing Schedule.

A contingency sum of 5% was included on each mosque sub-total.

Specialist Co-ordination

Co-ordination across:

MCS-accredited solar installers
NICEIC-approved electricians
Fatra-certified welders (warm-deck and cold-deck roof systems)
Structural engineer
DNO / National Grid liaison.
Scaffolders

Approach to Appointment

CEN acted as Principal Contractor with a central management team co-ordinating specialised teams between sites in a phased sequence.

Direct labour was deployed throughout the programme.

Fatra welders, G99-compliant electrical leads and EMS specialists were assigned according to each site’s requirements.

All sub-contractors held current accreditations.

Programme Delivery

Centrally co-ordinated phased delivery allowed roofers, electricians and MCS solar installers to move between the four sites in sequence, ensuring continuous progress while specialist resources were deployed effectively.

Daily compliance logs confirmed all high-impact works ceased 15 minutes before the Adhan (call to prayer).

Where remedial electrical works delayed one site, activities were resequenced across the four projects to maintain the overall programme.

Per-mosque working-day estimates (Pricing Schedule V2):

Iqra — 3.5 days
Madni — 3 days
Shahporan — 3 days
Dar-ul-Isra — 3 days

Three operatives were allocated to each mosque during installation phases.

The installation programme commenced on 19 March 2025 with scaffolding provided by a local specialist partner.

Substantive completion was achieved across all four sites by the end of May 2025.

Formal handover documentation, including cover letter, commissioning checklist, PV array test form, workmanship guarantee, completion of works record and handover documents, was delivered simultaneously across all four mosques on 11 June 2025.

Programme Scheduling

Detailed milestone-based timelines were aligned with prayer schedules and community events.

Adaptive planning allowed activities to be resequenced when remedial electrical works delayed one location.

Material lead times for Solar PV and battery components were incorporated into programme sequencing.

Regular reviews were held with mosque committees throughout the programme.

Client Engagement

Regular engagement was maintained with mosque committees and YnNi Teg Cymru throughout the programme.
Weekly progress meetings reviewed programme status, outstanding actions and any design changes required following surveys.
Daily communication with mosque representatives ensured access arrangements, prayer schedules and community events were respected.
Revised programmes were issued where required to accommodate unforeseen remedial electrical works while maintaining the overall completion date.

Resident Engagement

Daily engagement with mosque committees and community representatives ensured all works were planned around:

The five daily prayer times
Friday Jumu’ah prayers
Madrasa teaching sessions
Community events

High-noise activities were scheduled outside periods of worship wherever possible.

Safe pedestrian routes and access to prayer halls were maintained throughout the works.

Daily housekeeping ensured each mosque remained safe, clean and operational during the installation programme.

CDM

CEN acted as Principal Contractor under CDM 2015 across the four-site programme.

Site-specific RAMS were developed for each mosque, with additional controls for:

Daily dynamic risk assessments were completed before works commenced.

Scaffold inspections were carried out throughout the programme.

Specialist Fatra roof works were undertaken by certified installers.

Fire escape routes and access to prayer areas were maintained throughout the works.

External Parties

YnNi Teg Cymru
Bengal Dragons Foundation
National Grid / DNO for G99 approvals
Scaffold contractor
Structural engineer
Fatra-certified roofing specialists
Mosque committees across all four sites

Compliance & Relevant Certifications

MCS
NICEIC
BS 7671 Electrical Regulations
Current Building Regulations
G99 / DNO approvals
ISO 9001
ISO 14001
ISO 45001

client

Vale of Glamorgan Council

Project Type

Major long-running local authority heating service, repair and installation contract covering 4,000+ council properties across the Vale of Glamorgan. Held continuously since October 2016.

Measures / Technologies

Form of Contract

Local Authority service and maintenance contract — long-term partnership.

Bid Alignment

Local Authority — housing stock heating service across 4,000+ properties.

Value

£5,000,000 headline value.

Scheme Size

4,000+ council-owned properties.

Location

Vale of Glamorgan, South Wales.

Start Date

October 2016

end Date

Ongoing — live programme.

Project Highlights

Largest sustained Local Authority heating contract in CEN's portfolio
Continuously held since October 2016
More than 4,000 council-owned properties covered
£5 million+ headline contract value
Long-running Welsh Local Authority heating relationship

Innovation / Value Add

The document does not yet contain confirmed Vale-specific innovation or value-add evidence.

It identifies the following as possible areas to confirm:

Integrated dispatch system
Tenant communication
Transition of ASHP servicing capability as housing stock decarbonises

These should not be presented as confirmed project outcomes until the Vale of Glamorgan account team validates them.

Vale of Glamorgan Council — Service, Repairs and Installation Contract (4,000+ properties)

City Energy Group was appointed to manage the servicing and repair of gas boilers and associated heating equipment across Vale of Glamorgan Council’s housing stock from October 2016.

The contract has been continuously held and currently covers 4,000+ properties. The relationship spans servicing, reactive repairs and heating installations and replacements, making this the largest sustained Local Authority heating contract in CEN’s portfolio.

The headline contract value of £5,000,000 is evidenced in 2024–2025 bid responses.

Scope of Services

Annual servicing of gas boilers and associated heating equipment
Reactive repairs and breakdown response
Heating installations and replacements where required
Annual safety inspections and certification per property

Funding

Funded by Vale of Glamorgan Council under its housing revenue / capital programme.

Specialist Co-ordination

Gas Safe registered engineers
OFTEC where oil-fired
MCS-accredited heat pump engineers where heat pump technology is in scope
CEN’s central service desk and dispatch

Approach to Appointment

Initially appointed through competitive Local Authority procurement in 2016.

The contract has been continuously held since appointment.

Delivery Model

Long-term Local Authority service and maintenance contract.

Direct delivery through CEN’s heating service desk and dispatch model, using direct labour supported by a pre-qualified supply chain.

Programme Scheduling

Long-term Local Authority service and maintenance contract. Direct delivery through CEN's heating service desk and dispatch model, using direct labour supported by a pre-qualified supply chain
Reactive breakdown responses are sequenced through CEN's dispatch system.
Capital installation work is scheduled separately.

Resident Engagement

Tenants are engaged daily through reactive callout responses and the annual servicing programme.

The delivery approach includes:

CDM

External Parties

Compliance & Relevant Certifications

client

EON Energy / E.ON

Project Type

Long-running 10-year delivery partnership between Laver Group and EON Energy / E.ON Next, supporting EON’s Solar PV programme to the UK private market plus a separate Air Source Heat Pump installations programme via EON’s Local Authority Delivery (LAD) and Alternative Technology Pathway (ATP) funding routes.

Measures / Technologies

Form of Contract

Long-term programme partnership — 10-year Laver-EON delivery collaboration plus separate LAD & ATP framework for ASHP installations.

Bid Alignment

Domestic — utility-led private market Solar PV plus public-sector-funded ASHP retrofit.

Scheme Size

Solar PV programme:

Approximately 210 systems installed and maintained per annum
Approximately 1,050 systems delivered (2021-2025)

Wider context:

EON Energy installs approximately 800-1,000 Solar PV systems annually to the UK private market.
Laver delivers a substantial proportion of this.

Location

UK-wide

Wales
The Midlands
Leicestershire
London
South West

Start Date

10-year Laver-EON collaboration (approximately 2015-2016 onwards).

Solar PV programme volumes evidenced between 2021-2025.

end Date

Live — ongoing.

Project Highlights

10-year sustained EON-Laver delivery partnership
Strongest evidence of long-term client confidence in CEN's portfolio
Approximately 1,050 Solar PV systems delivered over the past five years across a multi-region UK footprint
Delivery includes both installation and aftercare through a single direct-labour model

Innovation / Value Add

Combined install-plus-aftercare model.

Laver delivers installation and the first two years of service and maintenance under one direct-labour team.

Strong fit for utility-led private-market models where the energy supplier wants single-supplier accountability for new installations and warranty-period support.

Multi-region direct-labour delivery footprint covering most of the UK private market.

Outcomes / KPI's Achieved

Sustained approximately 210 Solar PV installations per year
Approximately 1,050 Solar PV systems delivered over the past five years
Multi-region delivery across Wales, the Midlands, Leicestershire, London and the South West
10-year client relationship demonstrating sustained delivery quality and commercial reliability

Key Challenges, Solutions and Lessons Learned

Challenge

Maintaining direct-labour quality and consistency across multi-region UK delivery.

Solution

Regional direct-labour teams aligned to lead-generation cadence with central programme management.

Challenge

Balancing private-market installation pace with the two-year aftercare commitment for every system.

Solution

Integrated install-plus-service direct-labour model with rolling cohort handovers as systems exit the two-year service window.

Lesson Learned

Long-term utility partnerships require single-supplier accountability for both installation and warranty-period support.

Laver’s combined delivery model has been the operational differentiator sustaining the 10-year relationship.

Social Value / Environmental Contributions

EON Energy — Solar PV and ASHP (10-Year Laver Collaboration)

Laver Group has collaborated closely with EON Energy / E.ON Next for the last 10 years and supported EON in the delivery of Solar PV systems and the maintenance upkeep of those systems for EON’s UK private-market customers.

Over the past five years, Laver Group has installed and maintained around 210 Solar PV systems annually — approximately 1,050 systems total. Systems are spread across Wales, the Midlands, Leicestershire, London and the South West. Laver handles both installations and the first two years of service and maintenance, managed by direct labour.

A separate strand covers Air Source Heat Pump installations under EON’s Local Authority Delivery (LAD) and Alternative Technology Pathway (ATP) funding routes.

Initial Scoping / Feasibility and Design

Per-property Solar PV survey and design under EON’s private-market delivery model.

ASHP installations under LAD & ATP follow PAS 2035 / MCS pathway as required by the funding routes.

Funding

EON Energy as the contracting entity for the private-market Solar PV programme.

ASHP strand funded via Local Authority Delivery (LAD) and Alternative Technology Pathway (ATP) public funding routes administered through EON.

Specialist Co-ordination

Approach to Appointment

Direct labour delivery model for installations and maintenance.

Long-running relationship has built up the supply chain and operational footprint required for cross-UK delivery.

Programme Delivery

Direct-labour delivery model.

Laver handles installations and the first two years of service and maintenance per system.

Sustained approximately 210 Solar PV installations per year across the UK delivery footprint.

Operational hand-off to EON / system owner after the two-year service window.

Programme Scheduling

Wales
The Midlands
Leicestershire
London
South West

Resourcing aligned to EON’s lead generation cadence to maintain consistent installation flow.

Client Engagement

Long-running EON-Laver programme management.

Ten-year sustained delivery is the strongest evidence of client confidence.

Reference contacts:

Ben Melia (Solar PV programme)
Scott Emery (LAD & ATP ASHP strand)

Resident Engagement

CDM

Laver as Principal Contractor under CDM 2015 for installation works.

Property-specific risk assessments completed for every installation.

External Parties

Compliance & Relevant Certifications

MCS
NICEIC
Gas Safe (where relevant)
PAS 2035 / MCS for the LAD & ATP ASHP strand
ISO 9001
ISO 14001
ISO 45001

client

Caerphilly County Borough Council

Project Type

Long-running Local Authority heating service, maintenance and breakdown contract covering gas, oil, coal-fired and Air Source Heat Pump heating systems across 3,800 council-owned properties.

Measures / Technologies

Servicing and maintenance of gas boilers
Servicing and maintenance of oil boilers
Servicing and maintenance of coal-fired heating
Servicing and maintenance of Air Source Heat Pumps (ASHP)
Reactive boiler breakdown response
Annual safety inspections and certification

Form of Contract

Local Authority maintenance contract — long-term partnership.

Scheme Size

3,800 council-owned properties.

Location

Caerphilly County Borough, South Wales.

Start Date

1998

end Date

Live programme — CEN has held the current contract for approximately 8 years.

Project Highlights

Approximately 8 years of continuous tenure on the current contract
CEN involvement with Caerphilly in this space since 1998
3,800 council-owned properties
Mixed-technology heating fleet
Gas, oil and coal-fired heating maintained alongside Air Source Heat Pumps
Annual servicing, reactive maintenance and breakdown response under a single live Local Authority contract

Why This Contract Matters

The mixed-technology fleet demonstrates CEN’s capability across legacy and modern heating under a single live contract.

The 3,800-property scale demonstrates volume capability, while the sustained contract tenure demonstrates long-term client confidence.

Maintaining coal-fired and oil heating alongside Air Source Heat Pumps is directly relevant to evolving Local Authority decarbonisation strategies, where existing heating fleets must continue to operate reliably while new low-carbon technologies are introduced.

Outcomes / KPIs Achieved

Sustained approximately 8-year current contract
3,800 council-owned properties covered
Annual servicing delivered across a mixed-technology heating fleet
Reactive maintenance and breakdown response delivered across gas, oil, coal-fired and Air Source Heat Pump systems

Social Value / Environmental Contributions

Long-term local employment supporting Caerphilly residents and the wider South Wales supply chain.

Caerphilly County Borough Council — Heating Service, Maintenance and Boiler Breakdown Contract

CEN holds a long-running heating service, maintenance and boiler breakdown contract with Caerphilly County Borough Council, covering 3,800 council-owned properties across the borough.

The contract spans annual servicing, maintenance and reactive breakdown response across a mixed heating fleet of gas boilers, oil boilers, coal-fired heating systems and Air Source Heat Pumps.

CEN has held the current contract for approximately 8 years and has worked with Caerphilly in this space since 1998.

The mixed-technology scope demonstrates CEN’s capability to maintain both legacy and modern low-carbon heating technologies under a single live Local Authority contract.

Scope of Services

Annual servicing across 3,800 council-owned properties
Reactive maintenance and breakdown response
Gas boiler servicing and maintenance
Oil boiler servicing and maintenance
Coal-fired heating servicing and maintenance
Air Source Heat Pump servicing and maintenance
Annual safety inspections and certification per property
Reactive callout dispatch through CEN’s central service desk

Funding

Funded by Caerphilly County Borough Council under its housing revenue / maintenance budget.

Approach to Appointment

Sub-contractor and supply chain appointment under CEN’s pre-qualified supply chain governance, with continuous CSCS, Gas Safe and OFTEC verification.

Delivery Model

Long-term Local Authority service and maintenance contract.

Direct delivery via CEN’s heating service desk and dispatch model, using direct labour supported by a pre-qualified supply chain

Programme Delivery

Day-to-day delivery is managed through CEN’s heating service desk and dispatch model.

The programme includes annual servicing, reactive callout dispatch, safety inspections and certification across the council’s mixed-technology heating estate.

Programme Scheduling

Resident Engagement

Tenants are engaged daily through reactive callout response and the annual servicing programme.

The resident-first delivery approach covers:

CDM

External Parties

Compliance & Relevant Certifications

client

Powys County Council

Project Type

Two-strand programme:

Heating upgrades across Powys County Council’s housing stock
Whole-house retrofit of 16 1960s rural bungalows under the Welsh Government Optimised Retrofit Programme (ORP)

Measures / Technologies

Wall insulation
Roof insulation
Floor insulation
Replacement of inefficient LPG heating systems with Air Source Heat Pumps
Solar PV
Mechanical Ventilation with Heat Recovery (MVHR)
Heat pump replacement programme across approximately 2,250 council homes

Form of Contract

Local Authority — direct contract.

Bid Alignment

Local Authority decarbonisation and fuel poverty — ORP-funded whole-house retrofit demonstrator plus stock-wide heating upgrade.

Scheme Size

Heating contract: approximately 2,250 homes
ORP whole-house retrofit: 16 bungalows

Location

Powys, Mid-Wales — rural.

Project Highlights

Heating upgrades across approximately 2,250 Powys County Council homes
Whole-house retrofit demonstrator across 16 rural 1960s bungalows
Fabric-first retrofit covering wall, roof and floor insulation
Replacement of outdated LPG heating with Air Source Heat Pumps
Solar PV installation
Mechanical Ventilation with Heat Recovery (MVHR)
Delivery to occupied rural properties
Full PAS 2035 retrofit pathway on the ORP demonstrator strand

Why This Project Matters

The programme combines two distinct areas of Local Authority decarbonisation delivery: a large-scale heating upgrade programme across approximately 2,250 homes and a whole-house retrofit demonstrator targeting hard-to-treat rural properties.

The 16-bungalow ORP strand demonstrates an integrated fabric-first approach, combining insulation, low-carbon heating, on-site renewable generation and ventilation within the same retrofit programme.

Powys County Council ORP — Whole-House Retrofit of 16 Bungalows + Heating Upgrades to 2,250 Homes

CEN was appointed by Powys County Council to deliver a two-strand programme combining heating upgrades across approximately 2,250 council homes with a whole-house retrofit demonstrator across 16 1960s rural bungalows under the Welsh Government’s Optimised Retrofit Programme (ORP).

The 16 bungalows were poorly insulated, heated by outdated LPG systems and located in a rural, off-gas-grid area where tenants were exposed to high running costs.

The ORP strand combined fabric-first insulation improvements with low-carbon heating, Solar PV and Mechanical Ventilation with Heat Recovery, creating a full whole-house retrofit programme aligned with Welsh Government decarbonisation objectives.

Initial Scoping / Feasibility and Design

ORP Bungalows — Scope of Works
The 16 bungalows were built in the 1960s and located within a rural area of Powys. The properties were poorly insulated and heated by outdated LPG heating systems, exposing tenants to high running costs.
CEN delivered:
- Upgraded wall insulation
- Upgraded roof insulation
- Upgraded floor insulation
- Replacement of LPG heating with Air Source Heat Pumps
- Solar PV
- Mechanical Ventilation with Heat Recovery (MVHR) in each home
Heating Contract — Stock-Wide Programme
Across approximately 2,250 council homes, CEN delivered heating upgrades replacing inefficient legacy systems.

Funding

The 16-bungalow retrofit demonstrator was funded under the Welsh Government Optimised Retrofit Programme (ORP) and administered by Powys County Council.

Approach to Appointment

Local Authority direct contract.