Procurement Act 2023 and Britain's Empty Debarment List: Where Defence-Supplier Exclusion Really Attaches

For a European defence supplier, access to British military demand can no longer be judged by asking whether a company has been convicted, sanctioned or formally barred. Britain's central debarment list — the mechanism that would carry such names — has been capable of carrying them since 24 February 2025. At 10 September 2026 it carries none, having been approved with effect from 17 November 2025 and next due for review on 17 November 2026. An empty list is not the same as an open door, and reading it as one is the mistake this analysis is built to prevent.

The stakes are large and concentrated. Over the relevant period £40.6 billion passed from the Ministry of Defence's core department to UK and foreign-owned organisations, 45 per cent of it through non-competitive sourcing. Where nearly half the spend is awarded without competition, the question of who is eligible — and on what basis a supplier can be excluded short of a formal debarment — matters a great deal more than an empty central list would suggest.

The report works from the Procurement Act 2023 and the instruments and guidance that now qualify it, read against the enforcement and practice that decide the level at which exclusion becomes public. Exclusion can attach without a name ever appearing on the central list: through contract-level decisions, through national-security grounds, and through the subcontractor-replacement and industrial-continuity provisions that let a buyer manage a supplier out quietly. The central list is the visible tip; the operative exclusions happen below it, procurement by procurement.

For a European supplier, continued access is therefore a question about the whole Procurement Act machinery, not about whether it has been barred. A clean record on the debarment list says nothing about whether a contracting body can exclude the supplier on national-security grounds, or replace it as a subcontractor in the name of industrial continuity. The eligibility that actually matters is the one assessed at contract level, which is exactly where the £40.6 billion is spent and where 45 per cent of it is awarded non-competitively.

The empty list is itself informative. A debarment regime that can carry names and carries none, well over a year after going live, tells you that exclusion is being handled somewhere other than the public list — at the level of individual procurements, where it is less visible and much harder to contest. For a supplier that plans around "we have not been debarred", that is precisely the wrong place to be looking, because the decision that removes it from a competition will not appear on any list at all.

For an investor, then, British defence access is a function of the Procurement Act's exclusion grounds and national-security provisions, not of a clean debarment record. For a supplier, the work is to understand where exclusion attaches below the list — at contract award, on national-security grounds, through subcontractor replacement — before £40.6 billion is allocated around it. The empty list reassures the companies that read only the list; the money is decided by the companies that read the whole Act.

This analysis works through that machinery deliberately, and leaves the reader with the questions that decide the money:

• Britain's central debarment list has carried no names since 24 February 2025 — so where does exclusion from British defence work actually attach?
• With £40.6 billion spent and 45 per cent of it non-competitive, how much does eligibility turn on contract-level decisions rather than the public list?
• How do the Procurement Act 2023's national-security and subcontractor-replacement provisions exclude a supplier without debarring it?
• For a European supplier, is "we have not been barred" the right test for continued access to British military demand?