Westminster has redrawn the rulebook for sensitive public buying. Published on 26 March 2026, new Cabinet Office guidance puts British shipbuilding, steel, AI and energy infrastructure on a national security priority list, allowing departments to tilt awards towards domestic suppliers where this protects resilience. (gov.uk)

For steel, the bar is higher: departments should use British steel or set out a formal case for importing it, reinforcing the UK Steel Strategy referenced by ministers last week. (gov.uk)

A new Public Interest Test means outsourced service contracts above £1 million must be checked for whether in‑house delivery would offer better value or control. The measure covers over 95% of central government contracts by value, signalling a material shift away from outsourcing by default. (gov.uk)

Social outcomes move up the scoring sheet too. For contracts over £5 million, departments will publish and report annually against a specific social value goal, a change the Cabinet Office says captures more than 90% of central government spend by value. (gov.uk)

To ease bidding, the Cabinet Office is rolling out AI tools, simplifying terms and building a central data spine so small suppliers aren’t asked for the same paperwork twice. These steps sit on top of the Procurement Act 2023 regime that went live on 29 October 2024 and new SME spend targets set from 1 April 2025. (gov.uk)

Scale matters: the House of Commons Library estimates public sector procurement at £434 billion in 2024/25, so even a one‑point swing towards UK suppliers would move roughly £4.3 billion of work. At present, BCC/Tussell tracking suggests only about 20% of direct public sector spend went to SMEs in 2024, highlighting the opportunity if the rules bite. (commonslibrary.parliament.uk)

Strategically, the shift aligns with the government’s National Security Strategy 2025, which puts economic security and supply‑chain resilience alongside defence and foreign policy. Procurement is one of the quickest levers the state can pull to put that into practice. (gov.uk)

What changes for bidders day‑to‑day? Expect tougher scrutiny of steel origin and domestic content, clearer asks on apprenticeships and local jobs, and more weight on demonstrable community benefits in final evaluation reports. Firms that can quantify training pipelines and regional hiring should find that narrative strengthens a borderline score. (gov.uk)

The in‑house test raises a separate question for service providers: some work that would have been tendered may now be retained, shrinking the addressable pipeline in parts of facilities management, contact centres or business support. For competitions that proceed, evidence of knowledge transfer and performance guarantees will matter more than glossy case studies. Ministers are explicit about ending outsourcing by default, which is a strong signal to boards and bid teams. (gov.uk)

In our view, the practical test will be delivery: clear sector definitions, a workable steel justification process and transparent reporting on social value. For now, procurement leaders should map tenders above the £1 million and £5 million lines, pre‑write annexes on steel sourcing and apprenticeships, and audit UK supply‑chain capacity so bids can be turned quickly when guidance lands.