I am aware of the position. Under the Gas Act 1972 the Gas Corporation has a statutory duty to supply gas on request only to any premises within 25 yards of the gas main currently in use. The position on electricity is different. As my hon. Friend will know, the cost of a gas main is considerably more than that of an electricity main. In deciding whether to ask people for a contribution to link them to the gas main gas boards have to take into account both the capital cost and the revenue that might arise from such sales.