The total cost of replacing the Trident nuclear missile system will come to at least £205bn, far more than previously estimated, according to figures drawn up by the Campaign for Nuclear Disarmament (CND).

It has calculated the total on the basis of official figures, answers to parliamentary questions and previous costs of items including nuclear warheads and decommissioning nuclear reactors. It says it has not taken into account that past Ministry of Defence projects have frequently gone well over budget. …

The most expensive item would be the cumulative running costs, estimated by the government to be about 6% of the total defence budget. Crispin Blunt, Tory chair of the Commons foreign affairs committee, has calculated, on the basis of parliamentary answers, that a new Trident system would cost £167bn over a 30-year lifespan.

Replacing Trident will cost at least £205bn, campaigners say
http://www.theguardian.com/uk-news/2016/may/12/replacing-trident-will-cost-at-least-205-billion-campaign-for-nuclear-disarmament