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1935 Began operations providing security services
1949 Securicor advertised as having 14 years experience of providing security services; had a central control room; also offered tele-contact and bank escort services
1951 Night Guards became part of Securicor
1960 a 60 percent interest in the company was acquired by Kensington Palace Hotel Ltd for investment purposes. Later the same company acquired Night Security Ltd to run in conjunction with Securicor
1963 Heavy expenditure by Securicor to fund its expansion affected the parent company's earnings and its ability to raise its dividend
1964 Provided a range of services including security guards at client's premises, security patrols, security vehicles, consultancy and investigations.
1973 The Kensington Palace Hotel Ltd and Associated Hotels sold all their hotels. Associated Hotels was renamed Securicor; its quoted subsidiary Kensington Palace Hotel was renamed Security Services
1976 Security Services Ltd was 52 percent owned by Securicor Group
1977 Also owned a Ford dealership; the finance division contributed substantial profits; a significant part of the business was now outside the UK
1978 The parcels service had overtaken cash transport as the largest area of its business
1981 Acquired RCA Security Systems, which it was hoped would be the basis for developing electronic security systems business
1981 Securicor owned the largest private radio telephone network in the UK, with 5000 subscribers; planned to offer American-made Citizen Band radios for sale
1993 Securicor Custodial Services won the contract to run the London Metropolitan Court Escort and Custody services
1996 Securicor becomes a single PLC, incorporating Security Services
2006 The G4S brand was introduced worldwide