Glow Worm Boilers Ltd. of Derwent Foundry, Milford, Nr Derby.
1929 Part of Anthracite Radiation
1931 Glow Worm Boiler and Fire Co Ltd, Newman Street, London (see advert)
1934 Retail premises at Upper Regent Street, London[1]
1950 Acquired by South Western Industrial and Water Corporation
1951 Manufacturer of oil and solid-fuelled cookers, domestic boilers and contractor for the government[2]
1955 Became part of Midland Aluminium when that company split out of South Western Industrial.
1957 Owned by Midland Aluminium[3]
1974 Midland Aluminium was acquired by Tube Investments
1981 Glow Worm Boilers and Radiation-Ascot, both part of Tube Investments, were 2 of 6 boiler makers investigated for collusion in raising prices[4]
1987 TI Group sold its home heating division, Glow Worm Boilers and Parkray, to Hepworth Ceramic Holdings[5]