ADT Group
of Sunbury on Thames
1989 British Car Auctions changed its name to ADT Auctions[1]
1989 Previous name: Hawley Group; the company owned 20 percent of Nu-Swift, fire extinguisher maker and office cleaning contractor[2]
1989 ADT Ltd sold the last of its property service companies, to allow it to concentrate on electronic security systems and car auctions[3]
1990 Formation of ADT Group Ltd