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Mr. Butler
To ask the Secretary of State for the Home Department what is the total oil-fired boiler capacity within Her Majesty's prisons.
Mrs. Rumbold
The information requested could be obtained only at disproportionate cost. However, in the year 1989–90, 41·6 per cent. of the total energy used in Her Majesty's prisons was derived from oil, representing 609,440 megawatt hours. Virtually all this would have been produced by oil-fired boilers.