Energy Efficiency Mr. Dobson To ask the Secretary of State for the Home Department how much was invested in improving the energy efficiency of his Department in the latest available year. Mr. Waddington A total of £123 million was invested in the financial year 1989–90 in improving the energy efficiency of the prison service estate. I am not able to provide the information on the remainder of the Home Office estate, as the responsibility for most of it rests with the Property Services Agency at the Department of the Environment.