North Thames Gas Board , 1949-1973 Uxbridge and Hillingdon Gas Consumers Company , 1854-1949 North Middlesex Gas Company , 1862-1949 Gas Light and Coke Company , 1812-1949

North Thames Gas Board , 1949-1973 Uxbridge and Hillingdon Gas Consumers Company , 1854-1949 North Middlesex Gas Company , 1862-1949 Gas Light and Coke Company , 1812-1949

North Thames Gas Board (1949-1973): one of 12 Area Boards formed when the gas industry was nationalised in 1949, following the passing of the 1948 Gas Bill. Supplied area of 1,059 square miles stretching from Bracknell, Marlow and High Wycombe to the south east coast of Essex. When formed it was made up of a merger of 12 statutory gas undertakings: Ascot and District Gas and Electricity Company, Chertsey Gas Consumers Company; Commercial Gas Company; (Chartered) Gas Light and Coke Company; Hornsey Gas Company; Lea Bridge District Gas Company; North Middlesex Gas Company; Romford Gas Company; Slough Gas and Coke Company; Southend Corporation (Shoeburyness); Uxbridge Gas Consumers Company and Windsor Royal Gas Light Company. The North Thames Gas Board was dissolved in 1973 when it became a region of the British Gas Corporation. Note - Consumers Gas Companies were set up in consequence of dissatisfaction with the existing supplier.

Gas Light and Coke Company (1812-1949): founded in 1812, this was the first company to supply gas to London. The Company absorbed 27 smaller companies and several undertakings during its period of operation, including the Aldgate Gas Light and Coke Company (1819), the Brentford Gas Company (1926), the City of London Gas Light and Coke Company (1870), the Equitable Gas Light Company (1871), the Great Central Gas Consumer's Company (1870), Imperial Gas Light and Coke Company (1876), the Independent Gas Light and Coke Company (1876), the London Gas Light Company (1883), Pinner Gas Company (1930), Richmond Gas Company (1925), Southend-on-Sea and District Gas Company (1932), Victoria Docks Gas Company (1871) and Western Gas Light Company (1873). In May 1949, after the passing of the Gas Bill 1948, the Company handed over its assets to the North Thames Gas Board.

Brentford Gas Light Company (1821-1926): founded in 1821 at the instigation of Sir Felix Booth, the company had works at Brentford and retorts at Southall and covered a wide area including Hammersmith, Kensington, Southall, Twickenham and Richmond. Merged with the Gas Light and Coke Company in 1926.

Harrow and Stanmore Gas Company (1872-1924): Harrow Gas Works founded in 1855 by John Chapman and rebuilt in 1872 as the Harrow Gas Light and Coke Company Limited and became a statutory company as the Harrow District Gas Company in 1873. In 1894 it became the Harrow and Stanmore Gas Company. Merged with the Brentford Gas Company in 1924. Both merged with the Gas Light and Coke Company in 1926.

Pinner Gas Company (1868-1930): founded between 1868 and 1872, merged with Gas Light and Coke Company in 1926.

Hornsey Gas Company Limited (1857-1949): formed in 1857, became statutory in 1866, controlled by the South East Gas Corporation from 1939 and merged with the North Thames Gas Board in 1949.

Staines and Egham District Gas and Coke Company Limited (1833-1915): founded 1833, merged with Brentford Gas Company in 1915.

North Middlesex Gas Company (1862-1949): founded in 1862, with works at Mill Hill.

Uxbridge Gas Company (1841-1861): founded 1841 by T Stacey; faced competition from the new Uxbridge and Hillingdon Gas Consumers Company from 1854 onwards (the companies were known as the 'Old' Gas Company and the 'New' Gas Company). Amalgamated with The Uxbridge and Hillingdon Gas Consumers Company in 1861.

Uxbridge and Hillingdon Gas Consumers Company (1854-1949): formed in 1854 in competition with the Uxbridge Gas Company; became statutory in 1861; after 1918 expanded rapidly and purchased surrounding companies including the Beaconsfield Gas Company, Great Marlow Gas Company and Maidenhead Gas Company. Known as the Uxbridge, Wycombe and District Gas Company from 1921; the Uxbridge, Maidenhead, Wycombe and District Gas Company from 1925 and the South East Gas Corporation from 1936. It merged with the North Thames Gas Board in 1949.