Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,106 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
1914 Builders, contractors, decorators and furnishers. 
George Haward Trollope served as joint chairman until 1910 with Howard Colls, who had a great technical understanding of reinforced concrete, structural steel, and other innovations in construction.
1910 Following Howard Colls's death George Trollope became sole chairman.
Dr Oscar Faber was recruited as the firm's first chief engineer.
WWI The company constructed factories, hospitals, camps, aerodromes, and an aeroplane factory at Oldham which was the largest in Britain under a single roof (covering 6 acres).
Post WWI construction of several large banks, including the Hongkong and Shanghai Bank building at a cost of £1 million.
1924 George Trollope retired.
2000 became a subsidiary of Skanska UK