Kier Group engaged Prefabricated Solutions Ltd (PSL) to design, manufacture, and deliver 68 multi-service cell riser modules and 100 multi-service roof distribution modules for HMP Northumberland. The project was delivered under tight programme constraints and required close coordination with Kier and the wider design team. PSL integrated seamlessly into the design process and delivered the project on time and within the original budget restraints.
Key Deliverables
- 136 Multi service cell riser modules
- 200 Multi service roof distribution modules

Project Highlights
Seamless Collaboration
From initial design through to delivery, PSL worked closely with Kier and the wider project team to maintain a coordinated and efficient workflow. Their proactive approach and willingness to engage early helped align all stakeholders, building trust and keeping the project moving without friction.
Efficient Design Integration
PSL were involved early in the design process, ensuring prefabricated modules were fully integrated into the federated model. Close collaboration with MEP designers and architects enabled standardisation across key elements such as Build Works in Coordination (BWIC) and door positioning, reducing complexity and improving installation efficiency on site.
Proactive Problem-Solving
During installation, PSL maintained a practical and solution-led approach. Challenges were addressed quickly and effectively, supported by strong aftercare, ensuring minimal disruption and keeping the programme on track.
Logistics and Installation Efficiency
Modules were delivered in line with the project schedule, reducing on-site labour requirements and simplifying logistics. This approach improved site safety, accelerated installation, and supported on-time project delivery.
Key Benefits
- Improved Safety:
Offsite manufacturing minimised on-site risks, creating a safer working environment for all project stakeholders. - High-Quality Output:
All modules met stringent quality standards, with PSL’s proactive approach ensuring minimal disruption during installation. - Time and Cost Savings:
Early design engagement and prefabrication simplified complex challenges, resulting in reduced programme durations and cost efficiencies.