| Churchill Contract Services | Harpenden, Hertfordshire, St Albans | 44 | 40 |
| Churchil Contract Services | Harpenden, Hertfordshire | 2 | 2 |
| Churchill Contract Catering Service | Harpenden | 2 | 2 |
| Idverde | Coventry, Allesley, West Midlands | 4 | 39 |
| Cleanscapes | Dorking, Ockley | 4 | 8 |
| CGM Group East Anglia | Downham Market | 4 | 4 |
| Just Ask Estate Services | West Byfleet, Surrey | 4 | 3 |
| Cleantec Services | Watford | 3 | 13 |
| New Green Services | Welwyn Garden City | 3 | 3 |
| Norse Commercial Services | Norwich | 7 | 24 |
| Tenon FM | London | 4 | 4 |
| N Viro | Portsmouth | 4 | 2 |
| City & Kent Cleaning | Bexhill on Sea, Dorking | 4 | 4 |
| Pendergate | Hatfield | 4 | 4 |
| Regent Office Care | Coventry, Dodalming | 3 | 11 |
| MITIE Cleaning & Environmental Services | London, Tamworth | 3 | 4 |
| Bespoke Cleaning Services | Thornbury, Thirnbury | 3 | 2 |
| Total Support Services | Orpington, Croydon | 3 | 2 |
| Inivos | London, Kings Lynn | 3 | 4 |
| Atlas Contractors | Hanworth, Middlesex | 3 | 3 |
| Cordant Cleaning | London, Hillingdon | 3 | 3 |
| Countrywide Grounds Maintenance | Brackley | 2 | 23 |
| Gould Landscapes | Dartford | 2 | 9 |
| Pinnacle FM | London | 2 | 3 |
| Clean Green Cleaning Services | Hadleigh | 2 | 2 |
| R&J Facilities | Liverpool | 2 | 2 |
| Orbis Protect | Uxbridge | 3 | 19 |
| Hi Spec Facilities Services | Dartford | 3 | 11 |
| Solo Service Group | Swansea | 3 | 7 |
| Crystal Facilities Management | North Acton | 3 | 3 |
| Amity | Barnsley | 3 | 3 |
| Ideal Cleaning Services | Nottingham | 3 | 3 |
| Bunzl | London | 2 | 18 |
| Birkin Cleaning Services | Welwyn Garden City | 2 | 16 |
| Kingdom Services Group | Newton le Willows | 2 | 15 |
| Bulloughs Cleaning Services | Skipton | 2 | 14 |
| Compass Contract Services | Birmingham | 2 | 12 |
| Brayborne Facilities Services | Wokingham | 2 | 11 |
| ISS Mediclean | Weybridge | 2 | 7 |
| Glen Cleaning | Hotwells | 2 | 5 |
| Ecocleen Services | Wallingford | 2 | 4 |
| Gama Healthcare | Watford | 2 | 4 |
| Abm Facility Services | London | 2 | 2 |
| Bright Hygiene Management London | Harlow | 2 | 2 |
| CCM Facilities | London | 2 | 2 |
| Clean360 | Derby | 2 | 2 |
| GCC Facilities Management | Sutton | 2 | 2 |
| Grosvenor Integrated Services Holdings | Skegness | 2 | 2 |
| Imperial Cleaning Services | Chippenham | 2 | 2 |
| Interclean Estate Management Services | Cannock | 2 | 2 |
| Julius Rutherfoord | London | 2 | 2 |
| Juniper Pursuits | London | 2 | 2 |
| North Kent Cleaning Services | Hadlow | 2 | 2 |
| SBFM | Harrogate | 2 | 2 |
| Trafford Cleaning Services as Part of Trafford Council | Stretford | 2 | 2 |
| Xenex Disinfection Services | London | 2 | 2 |
| Integrated Water Services | Walsall | 1 | 9 |
| Interserve Facilities Management | London | 1 | 8 |
| Urban Environments | Sevenoaks | 1 | 7 |
| Hayward Services | Berkshire | 1 | 5 |
| Busy Bee Cleaning Services | Buckinghamshire | 1 | 4 |
| SMS Environmental | Didcot | 1 | 3 |
| Amulet Churchill Security Solutions | Harpeden | 1 | 3 |
| ISS Facility Services | Weybridge | 1 | 3 |
| Bidvest Noonan | London | 1 | 2 |
| Eplus Global | Newton Abbot | 1 | 2 |
| Alliance Facilities Management | Birkenhead | 1 | 1 |
| Bioquell | Andover | 1 | 1 |
| Derwent FM | Harrogate | 1 | 1 |
| Enterprise Support Servies | Welwyn Garden City | 1 | 1 |
| Fortis Hygiene & Maintenance Services | Manchester | 1 | 1 |
| Healthy Buildings | Reading | 1 | 1 |
| JSL Compliance | Ross on Wye | 1 | 1 |
| Kingdom Security | Newton le Willows | 1 | 1 |
| May Harris Multi Service Solutions | Longfield | 1 | 1 |
| MCS Cleaning & Maintenance | Coalville | 1 | 1 |
| Solutions 2 Contract Cleaning | Leicester | 1 | 1 |
| Trafford Metropolitan Borough Council | Manchester | 1 | 1 |
| Willow Property Management | Thetford | 1 | 1 |