North Thames Gas Board

The North Thames Gas Board was a state-owned utility providing gas for light and heat to industries and homes in part of England. The Board's area included parts of the County of London, Berkshire, Buckinghamshire, Essex, Hertfordshire, Middlesex and Surrey. The Board was established on 1 May 1949, and dissolved in 1973 when it became a region of the British Gas Corporation.

The Board took over the following local authority and privately owned gas production and supply utilities:

† Only the gas operations were acquired: the electricity undertaking had become part of the Southern Electricity Board in 1948.