The £350m contract to refit and refuel HMS Vengeance was confirmed by Defence Secretary Philip Hammond during a visit to Devonport Dockyard in Plymouth. The contract will sustain more than 1,000 jobs at Babcock in Devonport, and a further 300 at other companies in Plymouth. Such is the scale of the refit that another 700 jobs in the industrial supply chain across the UK will also be sustained. HMS Vengeance is one of the UK's four Vanguard Class submarines, designed to carry the UK's Trident nuclear missiles.