Mayor of London, Boris Johnson, said:
'I want London to become a leading low carbon, energy efficient city. This requires everyone to take action to become far less wasteful. Many people will be astonished that 50 per cent of energy usage in shops can be taken up just by keeping the doors open. The Close the Door campaign is one of the simple ways London's vibrant and innovative retail sector can help us achieve this, whilst saving money off fuel bills at the same time.'