The Department has a number of energy efficiency measures in place including encouraging staff in its London office to switch off lights when rooms are not in use and to ensure that computers are switched off at the end of the working day. The Department's Cardiff office is a modern building with built in energy efficiency measures. The Department does not have a direct contract for gas supply in its London office. The office is heated by the Whitehall District Heating System and is available between October and May each year. The Department has the flexibility to turn the heating off if temperatures are high during this period.