| Wensleydale Railway Association (Trust) | Northallerton | crakehallstation@gmail.com | Richard Leathley mob. 07526 162270 | Open → |
| Wesley Mason | Selby | wes@1stvamp.org | — | Open → |
| Wessex Water Plc | Bath | sewer.connections@wessexwater.co.uk | 01225 526333 | Open → |
| WEST | — | — | — | Open → |
| WEST | — | — | — | Open → |
| West Berkshire Council | Newbury | buildingcontrol@westberks.gov.uk | 01635 519694 | Open → |
| West Devon Borough Council | Devon | — | 01822 813728 | Open → |
| West Dorset District Council | Dorchester | b.control2@westdorset-weymouth.gov.uk | 01305 252254 | Open → |
| West Lancashire Borough Council | Lancashire | building.control@westlancs.gov.uk | 01695 577177 | Open → |
| West Lindsey District Council | Gainsborough, | Building.control@west-lindsey.gov.uk | x | Open → |
| West Midlands Fire Service Headquarters | Birmingham | contact@wmfs.net | — | Open → |
| West Oxfordshire District Council | Oxon | building.control@westoxon.gov.uk | 01993 770271 | Open → |
| West Oxfordshire District Council | WITNEY | building.control@westoxon.gov.uk | x | Open → |
| West Sussex Fire and Rescue Service | Chichester | — | — | Open → |
| West Wiltshire District Council | Wilts. | — | 01225 770321 | Open → |
| West Yorkshire Fire & Rescue Service | Birkenshaw | fire.safety@westyorksfire.gov.uk | 01274 655785 / 655827 | Open → |
| Westcourt Group | Hull | — | — | Open → |
| WESTGARTH | — | — | — | Open → |
| Westland Windows | Barnsley | — | — | Open → |
| WESTWARD HOMES LTD | — | — | — | Open → |
| WESTWARD HOMES LTD | — | — | — | Open → |
| Weymouth and Portland Borough Council | Dorchester | b.control2@westdorset-weymouth.gov.uk | 01305 251010 | Open → |
| Whaley Mark | — | markrwhaley@gmail.com | — | Open → |
| WHEADON | — | — | — | Open → |
| WHEATLEY | — | — | — | Open → |