asked the Secretary of State for Energy what areas have now been converted to natural gas; what is the programme for converting the remainder; and when he expects the entire programme to be completed.

British Gas has informed me that conversion of customers' appliances to use direct supplies of natural gas has already been completed in the Wales, East Midlands, Southern and Eastern Regions of the corporation. Conversion in Northern Region should be complete by the end of July and in South-West Region by the end of this year. North-Eastern and West Midlands Regions expect to complete their programmes during 1976 and Scottish Region during 1977.