HC Deb 16 November 1960 vol 630 c47W
71. Mrs. Hart

asked the Secretary of State for Scotland what he estimates would be the effects of the dropping of a 20-megaton bomb in the vicinity of the proposed Polaris submarine base in the Holy Loch.

Mr. Maclay

The effects would depend upon various factors such as the height at which the bomb was burst, the weather conditions, and the extent to which people had been able to take cover. As a general indication, the radius of total destruction from a bomb of this size might be about five miles. If the bomb were ground burst, a considerable area down wind would be affected by fall-out.