HC Deb 15 February 1978 vol 944 c283W
Mr. Litterick

asked the Secretary of State for Defence what is his Departments estimate of the radius of the area of total destruction in an urban target on flat terrain likely to be caused by the detonation of the standard nuclear warhead with which the British Polaris missiles are now loaded.

Mr. Mulley

It is not the practice to provide the information requested.