
An artist’s conception of the U.K.’s Successor-class future planned ballistic missile submarine (SSBN) released Tuesday. UK Ministry of Defense Photo
The U.K. Ministry of Defense is set to give manufacturers of the Royal Navy’s next nuclear submarine class $1.32 billion for early development funds for the program, according to a Monday report in The Financial Times.
The funds for Rolls Royce and BAE Systems is the first tranche of funding of a planned $40 billion following the House of Commons validation of the U.K.’s Trident nuclear deterrent in mid-July.
“So far [$5.2 billion] has been spent. Industry sources said the new round of funding would be used for continued design work and to order components that take a while to manufacture,” wrote the paper.
“It would also be used to secure production in the supply chain, which accounts for roughly half the cost of building a new submarine. The first steel is expected to be cut by the end of the year.”
The Successor boomer – the first set to deliver to the Royal Navy in 2028 – will field Trident II D-5 ballistic missiles with domestic warheads and replace the four Vanguard boats currently in service.
The Successor boats are being built in conjunction with the U.S. Ohio Replacement Program – set to be called the Columbia-class USNI News reported last week.

Workers stand pose for a photo in the four-tube “quad-pack” built for the U.S. Ohio Replacement-class and U.K. Successor-class. General Dynamics Electric Boat Photo via US Navy
“We will continue to maintain this strong strategic relationship to ensure a reliable and relevant strategic weapons system is deployed today on our Ohio and the U.K. Vanguard class as well, in the future, on the respective follow-on platforms,” Vice Adm. Terry Benedict, director of the U.S. Navy’s Strategic Systems Programs said last month.
The two classes will share a Common Missile Compartment, a quad pack of missile tubes that will be linked together to form the body of the submarine.
The U.S. program of 12 boats will cost an estimated $100 billion.