REPAIRS worth more than £6m are being carried out on a Royal Navy submarine and training centre by a Portsmouth engineering firm.
Atmosphere Control International in Hilsea secured the contract from the Ministry of Defence.
A spokeswoman for the government department said: ‘The work provides a needed equipment upgrade for in-service Vanguard class submarines.
‘It ensures the capability to maintain and control a breathable and safe atmosphere for submarine crews.’
HMS Vanguard was the first of four submarines in its class to carry out the Trident missile test firing in May 1994.