Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,150 pages of information and 223,040 images on early companies, their products and the people who designed and built them.
1956 Founded as Plessey Research Roke Manor by the Plessey Co. The first managing director was Harold J. Finden, an electrical engineer. Initially staffed by 28 engineers, the company undertook research into military communications systems.
1990 Taken over by the joint venture GEC-Siemens.
2010 Acquired by the Chemring Group