The MoD said the money would deliver major upgrades and new and replacement infrastructure across the naval base and dockyard.

The programme includes upgrades to 15 Dock, modernisation of 10 Dock, work on 14 Dock to enable submarine defuelling to recommence, and wider renewal and maintenance across the site.

Plymouth Sutton and Devonport MP Pollard said: “The threats facing the United Kingdom are real and they are growing. This government is not waiting – we are acting now to ensure our Royal Navy has the bases and infrastructure it needs to be ready to fight.”

Pollard said the investment would transform bases into warfighting-ready facilities that “directly improve Royal Navy readiness, availability and lethality”. Upgrades would see waterfront infrastructure modernised and new accommodation built.

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