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of Worcester and Clay Cross
1962 Business set up at the Old Vinegar Works in St. Martins Gate, Worcester.
1963 Established as supplier of oil-fired central heating equipment.
1967 Maker of the Firefly II oil-fired domestic boiler
1968 Moved to new premises in Diglis
1971 Introduced combi-boiler
1982 Acquired by Bifurcated Engineering
Presumably the Worcester business separated from BETEC at some point
1986 Floated on the London Stock Exchange - see Worcester Group
1987 Worcester Engineering was renamed Worcester Heat Systems