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1824 Company formed for purposes of lighting the principal towns of the Continent.
1820s John Seaward was connected with the Imperial and Continental Gas Company; lit several towns and cities both in Britain and abroad, particularly in France, Belgium, and Holland.
1825 Sir W Congreve, Hon J. T. Leslie Melville, Thomas Meux, J. Horsley Palmer were directors of the Imperial Continental Gas Co
Known as the Imperial Continental Gas Association
1841 Premises at 7 White Hart Court, Lombard St, London
WWI the company's operation were disrupted by the war, especially in Germany where the state ordered the liquidation of the company's property
1923 Received first instalment of compensation for wartime losses in Germany
1950 As part of the company's policy to spread its assets in case of nationalisation, the company had acquired British Sewing Machines Ltd and a substantial interest in Hamer-Porter Paints Ltd. Other British subsidiaries were Ewart and Son, James Stott and Co (Engineers), Utility Loan Co.
1985 ICGas had oil production operations in the North Sea and onshore USA; Calor was a another major business; it also had interests in Belgian gas and electricity distribution; in July it sold CompAir
1987 Split into two companies: Calor, including Century Power and Light, and Contibel Holdings, which had investments in a number of Belgian energy companies and was almost immediately taken over by Tractebel and Groupe Bruxelles Lambert of Belgium
1995 Voluntarily liquidated