| Name |
| Blackburn With Darwen Borough Council |
| Cambridge Water |
| Dental Warehouse Limited T/A Dial A TV |
| Folkestone & Dover Water |
| George Walker & Co |
| JD Williams |
| Newsquest Wales & Western |
| North Warwickshire Borough Council |
| North West Commercial Services |
| North Wiltshire District Council |
| Thomas Winter Insurance Limited |
| Walsall Housing Group Sundry |
| Walsall Housing Trust |
| Walsall Housing Trust Insurance |
| Walsall Metropolitan Borough Council |
| Waltham Forest Energy Services Limited |
| Warwickshire County Council |
| Watford Borough Council |
| Watford Community Housing Trust |
| Waveney District Council |
| Wealden District Council |
| Wear Valley District Council |
| Weaver Vale Housing |
| Welcome Finance Limited |
| Welwyn Hatfield Council |
| Wesnew Management Limited |
| Wessex Group Limited |
| Wessex Group Limited - Norwich Union Premiums |
| West Berkshire District Council |
| West Dorset District Council |
| West Kent Housing Rent |
| West Lancashire District Council |
| West Lindsey District Council |
| West Lothian Council |
| West Mercia Metropolitan County Council |
| West Midlands Metropolitan County Council |
| West Oxfordshire District Council |
| West Pennine Housing Association |
| West Wiltshire H S Ltd |
| Westcountry Publications |
| Westgate Property Management |
| Weybank Housing Co-Op |
| Weymouth & Portland Housing |
| Whitworth Housing Co-Op |
| Wigan Metropolitan Borough Council |
| Wilfrid East Housing |
| Wirral Partnership Homes |
| Wokingham District Council |
| Wolverhampton City |
| Wolverhampton City Council |