Project Royal Oak, Site by Site
£26 billion over ten years, one site’s increment disclosed, and a cost book promised for later in 2026
On 14 July 2026 the Minister for Defence Readiness and Industry, Luke Pollard, announced from HMNB Clyde what his written statement calls the largest investment in the United Kingdom’s naval bases since the end of the Cold War: approximately £26 billion over ten years across Clyde, Devonport and Portsmouth, under the label Project Royal Oak. Against the £298 billion Defence Investment Plan that contains it, the naval-estate line is 8.7 per cent. Within the same plan, Royal Oak is one of three ten-year estate programmes worth some £60 billion in total, alongside Project Castra for the Army estate and Project Trenchard for the Royal Air Force, which places the naval leg at roughly 43 per cent of the Ministry of Defence’s decade-long estate renewal. Against the Clyde Infrastructure Programme it subsumes — valued at £1.6 billion over fifteen years in 2019 and re-baselined at £1.87 billion in the 2024 portfolio data — it is an order of magnitude larger. The structural constraint is that a live nuclear-licensed estate must keep generating operational output while it is rebuilt, so sequencing, dock occupancy, regulatory permission and specialist labour bind before finance does. The Minister has confirmed that the total includes projects already announced and funded, and for one site the split is published. For the other two it is not, and a full breakdown has been promised for later in 2026.
This report proceeds in four sections. The first traces the institutional architecture through the Strategic Defence Review 2025, the Defence Investment Plan, the written statement of 14 July 2026, the Clyde Infrastructure Programme SRO appointment and Argyll and Bute Council papers. The second sets out legal, budgetary and procurement mechanics from the Government Major Projects Portfolio data, the MOD Annual Report and Accounts 2025-26, the National Audit Office investigation into submarine defuelling and dismantling and the Future Maritime Support Programme awards. The third examines industrial structure across the three sites, including Programme Euston, the Babcock concentration at Devonport and the KBS Maritime package pipeline at Portsmouth. The fourth sets out six decision-relevant implications. The report does not price individual packages, does not forecast award dates, and does not attribute unannounced work to named suppliers.