In a Strategic Defence and Security Review, the government said it would slash civilian staff by 30 percent and sell off large chunks of the ministry's estate to help pay for its security and defence plans over the next five years.

Replacing Britain's nuclear submarine fleet would cost 31 billion pounds, the review said, 6 billion pounds more than an earlier estimate.

(Reporting by Kylie MacLellan and Sarah Young, editing by Elizabeth Piper)

Stocks treated in this article : Boeing Co, Lockheed Martin Corporation, BAE Systems plc