Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,345 pages of information and 233,846 images on early companies, their products and the people who designed and built them.
1945 Dudley Coles Ltd was incorporated
1964 Acquired by Bath and Portland Group
1967 Name changed to Dudley Coles Long Ltd
Became the building and civil engineering division of the Group
1968 Management reorganised in order to stem losses in this division
1969 Bath and Portland integrated its building and civil engineering activities, forming 2 new subsidiaries: Marples Ridgway would be the new subsidiary carrying out all civil engineering work; Marples Ridgway (Building) would be the subsidiary controlling all building activities; Dudley Coles Long would be a subsidiary of Marples Ridgway (Building) 
1970 Name changed to Dudley Coles Ltd
By 1995 was a subsidiary of Kier Regional Ltd.