The Electricity (Supply) Act 1919 permitted undertakings to exchange electricity supplies, to work together or amalgamate. The CLELCo and three companies in south and east London - the County of London Electric Supply Company Limited; the South London Electric Supply Corporation Limited; and the South Metropolitan Electric Light and Power Company Limited - promoted the London Electricity (No.1) Act 1925.The National Archives, BT 31/31254/34406, Board of Trade, 14 & 15 George V, London Electricity (No.1) Act, 1925. A joint committee was established to direct the way in which the generating stations of each company were operated. The companies remained distinct electricity generation and supply undertakings, but were physically connected with interconnecting cables to exchange electricity.
