§ Mr. McKelveyasked the Secretary of State for Energy whether his Department has produced statistics on the relative thermal efficiency of energy production by various fuels and the efficiency of end-use appliances.
§ Mr. GrayStatistics published by my Department in this area are restricted to the efficiencies of non-nuclear steam stations in producing electricity and figures for the years to 1981 are given in the Digest of United Kingdom Energy Statistics series. The Digest also contains, in its opening notes, a description of some of the problems relating to the measurement of thermal efficiencies. A copy of the Digest may be found in the Library of the House. The Department does not at present gather statistical data on the efficiency of end-use appliances on a comprehensive basis, but it intends to publish data of the efficiency of individual types of appliance under test conditions as this becomes available following the forthcoming implementation of the Energy Conservation Act 1981.