

Shaping the Future of Offsite Construction
For more than 25 years, NG Bailey has led the evolution of offsite manufacturing from our dedicated Bradford facility, earning a reputation for delivering high‑quality prefabricated MEP solutions. Today, OSM unites five integrated services under one roof, creating a delivery model built on pace, quality and predictability. Our growing catalogue of standardised products ensures repeatable, reliable outcomes, while our consultancy team tailors every solution to the project’s specific technical requirements. This combination of standardisation and engineering expertise gives our clients the best of both worlds, solutions that are efficient, predictable and precisely designed where it matters most.

Industrial efficiency with engineered adaptability
By combining the strengths of bespoke engineering with the consistency of standardised manufacture, we deliver a smarter, safer and more sustainable way to build. Our vision is to transform how buildings and infrastructure are delivered across the UK by providing high‑quality offsite manufacturing solutions that clients can rely on. This hybrid model blends the efficiency of modern manufacturing with engineered flexibility, ensuring faster programmes, consistent quality and solutions tailored precisely to each project’s needs.
OSM LOGO CAROUSEL - TBC
Integrated solutions for the built environment.
OSM Consult
Our consultancy service provides expert guidance across all stages of a project. From MMC strategy and feasibility studies to BIM modelling and engineering technical management, OSM Consult helps clients unlock the full potential of their project with a focus on offsite manufacturing. We embed offsite thinking early, reducing risk, improving coordination and creating a clear route to efficient, buildable solutions..
OSM Assemble
Our OSM Assembly service brings complex MEP systems into a controlled factory environment where quality, safety and productivity can be optimised. By assembling and testing modules before they reach site, we reduce interfaces, remove programme risk and accelerate installation. Working closely with design teams, every solution is engineered for seamless integration, helping clients achieve faster delivery and the full benefits of offsite manufacturing.
OSM Weld
OSM Weld provides high-integrity welded solutions with the consistency of industrialised manufacture. Certified teams use advanced processes and rigorous inspection to deliver fully traceable quality. Moving critical welding offsite improves safety, reduces on-site congestion and protects programme certainty. Each component is precisely engineered and tested, ensuring efficient integration into modular MEP systems and wider project delivery.
OSM Ventilation
With over two decades of modular MEP expertise, OSM Ventilation strengthens our ability to deliver fully integrated offsite systems. We manufacture DW 144, fire-rated and stainless-steel ductwork to exacting standards, designed for seamless coordination with our assemblies. Bringing ventilation in-house reduces interfaces, risk and installation time, giving clients greater quality assurance, programme certainty and a single, accountable delivery partner.
OSM Hire
OSM Hire supplies the equipment and infrastructure needed to keep factory output and site activity aligned. Flexible, programme-led hire removes bottlenecks and maintains momentum from manufacture to installation. From lifting and handling to bespoke temporary works, every solution is coordinated to support safe, efficient delivery on site, helping clients realise the speed, certainty and productivity of offsite construction.

Our work in action
5 March 2026Helping Children Thrive Through Literacy – Chapter One
2mins

Safer, Better, Faster, Greener
Our Safer, Better, Faster, Greener approach is at the core of how we deliver Offsite Manufacture, driving our commitment to raising industry standards and transforming the way projects are designed, manufactured and delivered. By shifting activity into safer, controlled factory environments, we remove key on‑site risks and create the conditions for precision engineering and early collaboration, ensuring consistently better quality. Our industrialised processes accelerate delivery by reducing interfaces and programme uncertainty, while our facilities, spanning five [AW1] key UK locations and powered by sustainable energy, minimise waste, cut carbon and reduce vehicle movements to support a greener, more responsible way to build.
[AW1]Confirm number of locations
Meet our experts
Paul WylieManaging Director, OSM
Mark GriffinGrowth and Development Director
Graeme BradyOperations Director, OSM Consult
Anna ShepherdOperations Director, OSM Ventilation & Hire
Joe OgleOperations Manager, OSM Assemble
Richard CottonOperations Manager, OSM Fabricate
Mark WilsonOperations Director, OSM Major Projects
Ryah VyseOffsite Integration Manager
Andy HayFinance Manager, OSM
