Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,348 pages of information and 230,027 images on early companies, their products and the people who designed and built them.
of Broomhill Road, Wandsworth, London, SW18 and Carlton House, Lower Regent Street, London, SW1. Telephone: Whitehall 0221-6. Cables: "Stanrelays, London"
1928 Private company formed.
1933 Became a public company as Broadcast Relay Service Ltd
1939 See Aircraft Industry Suppliers
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Rediffusion All-Purpose sound amplification Services. Factory Installations supplied complete with selected recorded programmes. Broadcast Reception Service for Hotels, Offices, with Staff Location systems. All installations on complete maintenance basis. (Olympia, Ground Floor, Stand No. 1527 and 1529) 
1947 British Industries Fair Advert for Radio Communication Equipment, All-purpose Sound Amplification Services for Factories, Hotels, etc.; Redifon Radio Heating Plant and other Electronic Equipment; Direct Wire System of Broadcast Reception. (Music and Radio Section). 
1951 First wired television system introduced in Margate
1954 Rediffusion Vision Service established
1955 Rediffusion joined forces with Associated Newspapers, a subsidiary of Daily Mail and General Trust, to form Associated-Rediffusion, and won the coveted London weekday ITV broadcast franchise. They began broadcasting on 22 September.
1957 Company name changed.
1961 Parent of 67 operating subsidiaries. Employs 10,000 persons. Manufacturers of transmitting, receiving, amplifying and control apparatus, radio-communications and electronic equipment, flight simulators, navigational aids, induction heaters and plastics products for industry.  
1967 BET acquired a controlling interest in Rediffusion
1983 BET acquired the remaining 36% of Rediffusions equity.