 Drakelow B was one of the CEGB’s twenty steam power stations with the highest thermal efficiency; in 1959-60 the thermal efficiency was 32.38 per cent, in 1963–4 the thermal efficiency was 33.81 per cent, 33.26 per cent in 1964–5, and 31.49 per cent in 1965–6.The annual electricity output of Drakelow B was