Programmes to improve household energy efficiency and reduce energy consumption cost taxpayers and householders around £2.6 billion a year.

A report released by the National Audit Office found signs that the long-term growth in household energy consumption is beginning to reverse. But greater efforts will be needed to maintain this recent improvement.

A typical UK household could save about 30% of their energy bills if they adopted available energy saving measures. Recent surveys by the Energy Saving Trust highlight that 71% of households leave appliances on standby, 63% forget to turn lights off in rooms and 28% leave heating on when their house is unoccupied. Reducing household energy consumption is also an important element of UK climate change policy, and assists other objectives, including combating fuel poverty and improving energy security.

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The energy efficiency of households improved by 19% between 1990 and 2004. The report found that this improvement was offset by a rise in household energy consumption caused by trends such as more and smaller households and the growth in consumer electronics. Since 2004, however, household energy consumption has begun to fall.

Tim Burr, Head of the National Audit Office, said: "There are encouraging signs that the long-term growth in household energy consumption is reversing. But most of us still forget to turn off the lights in empty rooms, and building regulations to save energy in homes are not always followed. If targets are to be met, departments need to improve their understanding of how programmes are working in real homes, and how householders are responding to them."

(CD/JM)