- Washington & Riley Ltd - 1 William Clowes Street, Stoke On Trent, Staffordshire, ST6 3AR
- Washington Components Ltd - Prestex House, Tyne & Wear, NE37 2SF
- Washington Direct Mail Ltd - Kingsway South, Gateshead, Tyne and Wear, NE11 0SH
- Washington Metalworks - Bath Road, Gateshead, Tyne & Wear, NE10 0LH
- Washmaster - Commerce Court Challenge Way Cutler Heights Lane, Bradford, West Yorkshire, BD4 8NW
- Washroom Cubicles - Victoria Road, Halesowen, West Midlands, B62 8HY
- Washroom UK - 11 Westfield Grove, Goole, North Yorkshire, DN14 0TL
- Washroom Washroom - The Loughton Seedbed Centre, Loughton, Essex, IG10 3TQ
- Washtechnix - 6 Tower Road, Bristol, Somerset, BS15 1PG
- Washware Essentials Ltd - Kestrel Court, Bristol, Somerset, BS20 7AN
- Wason & Webb Ltd - Meadow Farm, Marlborough Road, Swindon, Wiltshire, SN4 7SA
- Wasp Barcode Technologies - Suite 35, West Malling, Kent, ME19 4YU
- Wasp Control / Wasp Nest Dorset - 18 Syward Close, Dorchester, Dorset, DT1 2AL
- Wasp Services - Gatehouse Greenfield Complex, Alloa, Clackmannanshire, FK10 2AL
- WASP Welding & Decorating - H M S President 1918, London, EC4Y 0HJ
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