It is estimated that, in only thirty years from now, over three quarters of all electricity in the United Kingdom will be generated from nuclear power and that more than half of this nuclear generation will stem from fast breeder reactors (to the development of which almost half the effort on the Authority’s reactor programme is currently geared).

Sir John Hill had already expounded to the fourth U. N. Conference on the Peaceful Uses of Atomic Energy in Geneva in September 1971 on the "strategic plan" endorsed by the electricity authorities, the nuclear power industry and the AEA:

By 1979-80 we should have had seven years’ operating experience with the PFR, constructional experience of perhaps three or four large commercial stations, and initial generating experience from the first of these larger units. On this basis we would expect that by approximately 1980 we would have sufficient confidence and experience to incorporate fast reactors into the United Kingdom generating system to the maximum extent consistent with the availability of fissile material and the growth of demand for new generating plant. Whether such a timetable can, in fact, be achieved will depend on technical developments over the next few years. This, however, is the plan to which we are working and so far we see no reason why it should not be achieved.