Why do prime contractors choose Warren?

OEMs, including MOD prime suppliers, choose Warren for our management of diligent, responsive, and fully documented in-house welding and fabrication processes. We know you can’t compromise on quality or security when delivering mission-ready equipment, particularly to the UK Armed Forces.

Def Stan‑ready welding and fabrication

Our Responsible Welding Coordinators and International Welding Specialists lead an in-house team of accredited welders. Their professionalism ensures we deliver consistent performance, structural integrity and repeatable quality for armoured vehicles, blast‑resistant structures and other complex sub-assemblies. We have built our independently verified welding capabilities on these standards:

• EN ISO 3834‑2 – certified welding
• DIN 2303 Q2 BK2 – defence‑sector weld integrity (actively working towards DIN 2303 Q2 Bk1)
• EN‑1090 EXC3 – steel and aluminium welding, fabrication and finishing
• CSWIP3.2 – visual welding inspection.

Working with high-grade welding materials and processes

Our state-of-the-art Fronius (MIG and TIG) welding plants enable us to work with ferrous and non-ferrous metals, including:

• High strength steel
• Stainless steel
• Aluminium.

We have experience of welding everything from thin sheets through to wall sections and High Strength Low Alloy (HSLA) plate. Our precision fabrication and assembly processes fully comply with EN1090 Exc3 and we ensure robust contamination-control between materials.

Technical assurances for precision fabrications

Our team is used to working under high scrutiny for customers who demand exceptional quality and precision. We are committed to ensuring our welding, fabrication and other disciplines continue to evolve and align with those demanding requirements. By embedding this approach in all our projects, we reduce supply chain risks for prime contractors working on civil or defence programmes.

As well as our core quality standards, we:

• Supply full digital documentation, with quality inspection reports and materials certificates, for audit-ready delivery
• Apply robust inspection processes, including independent, non-destructive, MPI testing
• Conduct technical reviews and continuous improvement processes to ensure ‘right first time’ for our customers’ mission-critical assemblies and high-integrity components
• Manage the entire process in-house at our Thetford HQ.

Secure, compliant and defence‑aligned supply chain partner

Warren is geared up to meet the expectations of defence and civil infrastructure procurement teams.

Warren offers Supply Chain confidence

Our aim is to be your trusted long-term partner. To that end we are:

• Joint Supply Chain Accreditation Register (JOSCAR) members for onboarding with recognised, pre-qualification compliance information
• Cyber Essentials Plus qualified for secure data handling and documentation
• Committed to clear communications and rapid issue escalation.

We conduct detailed safety and quality checks throughout the manufacturing process to ensure our operations remain compliant for UK defence programmes. We digitally collate all essential control documents into auditable packs, ready for final delivery, to ensure a seamless flow of data on processes and parts. This helps eliminate delays on receipt of goods.

For added reassurance, we continue to invest in complying with the following standards:

• ISO9001 / ISO14001 / ISO45001
• Qualicoat for aluminium powder coating
• Manufacturing products that our customers have designed to comply with UK (UKCA) and EU (CE) regulations, including providing comprehensive digital evidence packs
• Manufacturing products that our customers have designed to comply with North American (UL/CSA) regulations.

Full-service subcontractor capabilities that support Tier 1 suppliers

Beyond welding and fabrication, we offer primes a fully managed, integrated build process for fabricated assemblies to defence industry quality. That means we can fit seamlessly into your supply chain as a single-source subcontractor. This enables you to scale production fast while maintaining quality and meeting tight delivery times.

In-house subcontractor capabilities

• CNC machining for precision‑critical components
• Skilled cutting (with laser or water jets) and folding
• Blasting and wet painting processes that comply with defence and military specifications
• Assembly, precision quality finishing, packing and secure delivery
• Digitally collated quality documentation for MOD and Tier‑1 acceptance on delivery.

Our approach delivers tight tolerances, durability and full traceability across every component. By removing external bottlenecks, we reduce supply chain complexity and ensure timely deliveries.

Strengthen your military manufacturing capabilities

Warren supports OEMs and Tier‑1 suppliers who deliver armoured vehicles, tactical platforms, support vehicles and specialist defence systems to the UK MOD.

Investing in the UK Supply Chain’s future workforce

Warren has built its knowledge and expertise over 35 years of working with customers across multiple sectors. During that time, we have always encouraged and supported our employees to develop their skills. We are particularly proud of our award-winning reputation for training and employing apprentices, including some who now hold leadership positions across the business.

Our apprentice programme demonstrates our dedication to our local community. It also reflects our founder’s lifelong passion for developing the UK’s future workforce. As a result, we are confident of having the right people, with the right skills to deliver for all our customers, now and for years to come.

Building sustainability into your supply chain

As you’d expect from an innovative and forward-looking company, Warren is committed to developing sustainable processes and reducing inputs. We have now achieved Net Carbon Neutral (Scope 1 and 2) by using energy efficient systems, recycling materials, insulating our buildings, using EVs and generating our own power. This has the added advantage of making us more competitive, which is good for Warren and our customers.