Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,108 pages of information and 233,634 images on early companies, their products and the people who designed and built them.
formerly the Heston Aircraft Co
1966 Announces 10% Scrip issue 
1971 Manufacturing Sherpa fork lift trucks at Heston 
1983 Acquired Duple Motor Bodies
1989 Management buyout of the engineering businesses, including Dennis, was called Trinity Holdings