Question to the Ministry of Defence:

To ask the Secretary of State for Defence, when his Department plans for work to begin on rectifying electrical and propulsion faults on the Daring Class Type 45 Destroyer; which ships such rectification work will involve; and when his Department plans for such work to end for each such ship involved.

A number of measures to improve the reliability of the Type 45 Power and Propulsion systems have been identified and the ongoing programme to implement these changes continues to deliver positive results, with the majority of work undertaken so far being at Her Majesty's Naval Base, Portsmouth.

In addition, and as part of the Strategic Defence and Security Review 2015, we are committed to improving system resilience by adding upgraded diesel generators to provide further electrical generation capacity. Alternative technical options and a variety of delivery models are currently being explored with several competing industrial partners. The total cost and timetable for implementing the diesel generator upgrade will be determined at the main investment decision. I am withholding details of our current time and cost estimates as premature disclosure of this information could prejudice the commercial interests of the Department.