Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what recent estimate his Department has made of how long it will take to integrate the Common Combat System onto Astute and Vanguard-class submarines.

I am withholding information on plans for fitting the Common Combat System (CCS) to Vanguard and Astute Class submarines for the purpose of safeguarding national security.

I am also witholding cost estimates for integrating the CCS onto the Astute and Vanguard-class submarines as to do so would prejudice commercial interests.