HC Deb 18 January 1985 vol 71 c255W
Mr. Alton

asked the Secretary of State for Defence over how many years his Department's budget will bear the costs of Trident; and what percentage the project will represent of the total defence estimates in each of those years.

Mr. Butler

The procurement period for the Trident system is currently assessed at about 20 years, during which it will account on average for some 3 per cent. of the defence budget and about 6 per cent. at its peak.

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