Independent Assurance for Safety-Critical Programmes

Requirements. Hazards. Evidence. All Linked, All Traceable.

When a safety case, design change, or regulatory submission needs to stand up to scrutiny, our specialists provide independent assurance, safety case, risk, and regulatory support. We challenge assumptions, substantiate decisions, and connect claims to evidence.

In Depth. By Design.

We bring four official principles to complex engineering decisions: Defence in Depth, Observability in Depth, Safety by Design, and Security by Design. The judgement stays with your people; our work makes the assurance basis clearer, faster, and easier to defend.

Our services cover the assurance lifecycle:

• Independent Peer Review and Technical Assessment: An objective critical-friend review of engineering assumptions, safety cases and structural arguments before they reach a regulator.
• Independent Nuclear Safety Assessment (INSA) and Independent Safety Audit: Formal independent assessment and audit that gives authorised decision-makers a defensible view of nuclear safety documentation.
• Intelligent Customer and Supply Chain Assurance: Oversight frameworks and qualitative audits that demonstrate effective control of tier-one and tier-two engineering suppliers.
• Software and AI Safety Assurance: A process-driven audit of software and AI safety assurance, without writing or testing the client’s code.
• Board-Level Regulatory Risk Strategy: Direct, strategic counsel for corporate boards facing enforcement notices, compliance bottlenecks, or complex technical governance transitions.
• Transactional Technical Due Diligence (M&A): Providing rapid, confidential engineering asset evaluations, technical debt tracking, and regulatory defensibility profiling for defense and energy sector acquisitions.
• Independent Expert Assessments & Instructions: Providing objective causation analysis, independent peer reviews, and technical compliance verifications compliant with legal or regulatory dispute frameworks.
• Fire, Explosion and Major Accident Hazard Assessment (Qualitative & Methodological): Qualitative HAZID, HAZOP, fault-tree and ALARP methodology for fire, explosion and major accident hazards, without CFD overhead.
• Modification and Design Substantiation: Discrete, rapid-turnaround safety arguments for plant modifications and engineering changes using documentation-driven logic.
• Periodic Review and Safety Case Remediation: A structured review of legacy safety cases that identifies compliance gaps and turns them into a proportionate remediation roadmap.
• Safety Case Development and Support: Modular, text-driven safety arguments for defined systems, facility components and SMR vendor modules.
• Competency Development and SQEP Training: Repeatable workshops, mentoring and framework design that help teams build internal safety case capability to SQEP standard.

The Problem

Assurance should be Continuous, not Periodic

Safety case engineering, design information, analysis, argument, and evidence often live in separate systems and files. The rigour is real, but teams still spend weeks reconstructing what changed, which claims were affected, and whether the evidence remains sufficient.

Between reviews, a case can age quietly against a design that has moved on. We help teams keep the assurance question visible while there is still time to act.

The Difference

Your teams own the decision. We help make the evidence defensible by working alongside existing engineering systems to challenge assumptions, connect claims to evidence, and keep safety case work moving.

Where useful, the DueTelligence Platform provides the traceability and impact view that supports the engagement between reviews.

Discuss a real requirement

Bring a live requirement, design change, safety case, or regulatory question. We will explore the assurance challenge with you and explain how our services and Platform can help.