Harlech Glass Limited | 11th October 1944 to 31st December 1977 |
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Chaseman Security Limited | 31st December 1977 to 23rd July 1991 |
Securicor Custodial Services Limited | 23rd July 1991 to 18th June 2003 |
Securicor Justice Services Limited | 18th June 2003 to 1st June 2005 |
G4S Justice Services Limited | 1st June 2005 to 23rd March 2009 |
G4S Care And Justice Services (UK) Limited | 23rd March 2009 to current |