To ask the Secretary of State for Defence what estimate he has made of the proportion of spending on the replacement for Trident which will go to US companies. (264971)

The work necessary to ensure the maintenance of the UK's nuclear deterrent is still in the concept phase. The investment decision point, Initial Gate, for the new submarine class to replace Vanguard class is not expected until this autumn. As such, it is too soon for such an estimate to be made.