Central Government Departments and their executive agencies are required to report performance data on their energy consumption for their office estate annually as part of the Sustainable Development in Government (SDiG) reporting process, to assess performance against the target to reduce carbon dioxide emissions from offices by 12.5 per cent. by 2010-11 against a 1999-2000 baseline.
The Department does not hold comprehensive information on how much electricity, gas and other fuel was used across the whole Home Office estate and its agencies for the last 10 years.
The latest assessment of Government’s performance against these targets was published by the Sustainable Development Commission on 12 December 2008:
http://www.sd-commission.org.uk/sdig2008/