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Nuclear Submarines

As my right hon. Friend says, Governments of both persuasions over the years have adopted a prudent and precautionary approach to the safety of our nuclear submarine fleet, and have invested money, where it is necessary to do so, on the basis that safety always takes priority. As I have said, the decisions that I am announcing today are not driven by concerns about safety. There is no safety risk identified from this incident. They are driven primarily by concerns about future submarine availability.

The information on core burn is classified, but I can reassure the House that the percentage of core burn on the reactor at Dounreay exceeds by far the percentage of core burn on any of our operational reactors.