There are reasons, as the hon. Gentleman knows, for this situation, principally because the CEGB system contains a smaller proportion of hydroelectric plant than systems in other EEC countries. That is a fact. This type of plant is capable of a more flexible mode of operation than are conventional steam-fired plants and can meet demand peaks more efficiently. As the hon. Gentleman knows, there is also the question of age. I should tell him and the House that the highest thermal efficiencies in 1974 were achieved by the Fawley oil-fired station and the Ratcliffe coal-fired station, which both achieved efficiency in excess of 37 per cent.