The new Energy Saving Opportunity Scheme (ESOS), launching in December, will help large organisations cut their electricity use with a detailed energy audit. The Government press release said that by reducing energy consumption by 1 per cent, big businesses could save over £250 million on their energy bills annually. Big businesses are paying for five power stations worth of electricity each year they don’t need. However even reducing their energy consumption by 1 per cent could save over £250 million on their energy bills annually.

... Energy and Climate Change Secretary Ed Davey ... said: "Britain’s big firms are spending around £2.8 billion extra each year on inefficient energy technologies – the equivalent output of nearly five power stations."

Through ESOS all large organisations that employ at least 250 people, or have an annual turnover of above around £40 million and a balance sheet above around £34 million, must carry out energy audits every 4 years.

The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme for all large organisations - including businesses, charities and universities - in the UK. Government estimates this includes around 9,400 organisations. The scheme does not apply to the public sector.

Qualifying organisations must carry out energy audits every 4 years, with the first assessment due by 5 December 2015. The audits will provide them with high-quality information about how they can improve their energy efficiency and ultimately save money on their energy bills.

More details about ESOS.