Question to the Ministry of Defence:

To ask Her Majesty’s Government what long lead items have already been ordered for the replacement for the Vanguard-class submarines.

The long lead items ordered for the Successor submarine programme comprise:

Weapons Handling and Launch System

Gearbox components and associated equipment

Material to support the manufacture of Missile Tubes

Material to support the manufacture of Integrated Tube and Hull Fixtures

A number of other long lead items for the Pressurised Water Reactor 3 reactor plant and the associated main propulsion systems have also been ordered to support the overall build schedule; however, specifics of these items are withheld for the purposes of safeguarding national security.