HC Deb 15 January 1985 vol 71 cc84-5W
Mr. Alton

asked the Prime Minister if she will make a statement on the effect of the exchange rate on the cost of Trident; if she will estimate the present cost of the project; and how this compares with the 1980 estimates.

The Prime Minister

My right hon. Friend the Secretary of State for Defence is currently reviewing the estimate of cost of Trident and expects to make an announcement to Parliament shortly. The latest published estimate for the Trident programme based on the use of the Trident D5 missile, is £8,729 million at an exchange rate of $1.53 = £1. The original estimate for Trident given in 1980 and based on the Trident C4 missile, was £4,500 million to £5,000 million. Of the increase in cost, about £1.25 billion relates to exchange rate variations.