Mint Security Limited | 14th March 1972 to 23rd July 1991 |
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Securicor Guarding Limited | 23rd July 1991 to 27th March 2002 |
Securicor Security Limited | 27th March 2002 to 3rd June 2005 |
G4S Security Services (UK) Limited | 3rd June 2005 to 16th March 2009 |
G4S Secure Solutions (UK) Limited | 16th March 2009 to current |