Dr. ThomasTo ask the Secretary of State for Energy what were the sources of information underlying the figures in his departmental press release No. 180, issued on 5 December, on imports and exports to the nearest kilogramme of separated and unseparated plutonium.
§ Mr. Michael SpicerThe figures on imports and exports of plutonium were compiled from data supplied by British Nuclear Fuels plc and the United Kingdom Atomic Energy Authority.
Dr. ThomasTo ask the Secretary of State for Energy why, in note 4 to paragraph 1(A) of his departmental press release number 180 on plutonium figures the percentages cited have been rounded to the nearest 5 per cent.; and whether his Department possesses data to a greater degree of accuracy than this.
§ Mr. Michael SpicerThe estimates of fissile content are shown to the same precision as in the estimates given by the electricity boards to my Department.