A complete answer cannot be provided as validated carbon emission information is only available from 1999. The following figures are based on kilograms of carbon emitted per square metre of lettable area in our HQ buildings.
kgC/m2 1999-2000 28 2000-01 30 2001-02 29 2002-03 28 2003-04 32 2004-05 31 Note: These figures exclude carbon emissions from road vehicles used for Government administrative operations as this information is not held.