Company Index
- W B B Minerals - Sandbach
- W Christie & Co. Ltd. - Glasgow
- W H Tildesley Ltd. - Willenhall
- W Hawley and Son Ltd - Burton on Trent
- W Maass UK Ltd - St Helens
- W S Jenkins & Co. Ltd. - London
- Wachs Ltd. - Sandbach
- Wade International Ltd. - Halstead
- Walker Filtration Ltd. - Washington
- Wally Burnett - Interventions Engineer - Stonehaven
- Walport International Ltd - Reigate
- Walsall Chemical Co (Metal Treatments) Ltd - Willenhall
- Walter Page(Safeway's)Ltd. - Bedford
- Wam Contract Services Ltd. - Rochdale
- Warner-Lewis Jr Industrie-Filter GmbH - Hook
- Warren-Morrison Valves Ltd. - Southampton
- Warwick International Ltd. - Holywell
- Warwickshire Oil Storage Ltd. - Tamworth
- Water Treatment Products Ltd. - Pontypool
- Waterlife Research Industries Ltd. - West Drayton
- Watermota Ltd. - Newton Abbot
- Watkins Hire (Manchester) - Manchester
- Watkins Hire (Scotland) - Falkirk
- Watkins Hire (Southampton) - Romsey
- Watkins Hire (West Midlands) - Walsall
- Watkins Hire Ltd - Coleford
- Watkins Hire Ltd (Southeast) - Wrotham
- Watkins Hire Ltd (Yorkshire) - Dewsbury
- Watson Petroleum Ltd - Wisbech
- Watson-Marlow Pumps Group - Falmouth
- Weatherford Pipeline Specialty Services - Aberdeen
- Wefco (Gainsborough) Ltd - Gainsborough
- Weidlinger Associates Ltd. - Glenrothes
- Weidmuller Ltd. - West Malling
- Weir Power and Industrial - Glasgow
- Wenaas UK Ltd - Aberdeen
- WEP Ltd (Anochrome Group Head Office) - Wolverhampton
- Werit UK Ltd - Manchester
- WERMA (UK) Ltd - Kettering
- Wessex Galvanizers Ltd. - Eastleigh
- Wessington Cryogenics Ltd - Houghton le Spring
- Wessington Group Ltd. - Reading
- West Highland Gas - Oban
- Westbrook Welding Alloys Ltd. - Warrington
- Western Environmental - Bristol
- Westford Plastics & Engineering Ltd. - Wellington
- Westgate Fastenings - Great Yarmouth
- Westlakes Scientific Consulting Ltd - Moor Row
- Westside Welding and Engineering Ltd - Welwyn Garden City
Wheelabrator Group Ltd - Altrincham- Whitby Tanks Ltd - Whitby
- Whitchem Ltd. - Newcastle
- White Light Design Associates Ltd. - London
- White Young Green plc - Salford
- Whiteley Read Engineering - Rotherham
- Wickham Industries Ltd - Leeds
- Wickham Laboratories Ltd - Fareham
- Willacy Oil Services Ltd - Deeside
- Willenhall Tube and Forging Co Ltd - Walsall
- William Blythe Ltd - Accrington
- William Coulthard & Co. Ltd. - Carlisle
- Winn and Coales (Denso) Ltd - London
- Winwood International Ltd. - Aberdeen
- Wirral Fospray Ltd - Deeside
- Witham Oil & Paint Ltd - Lincoln
- Witt Gas Techniques Ltd - Warrington
- Witton Chemical Co Ltd - Bury St Edmunds
- Woburn Chemicals Ltd. - Milton Keynes
- Wockhardt UK Ltd - Wrexham
- Wolf Safety Lamp Co Ltd, The - Sheffield
- Wolseley Plc - Reading
- Wood Group Gas Turbine Services Holdings Ltd - Aberdeen
- Wood Group Pressure Control Ltd. - Peterhead
- Wood Group Pressure Controls Ltd - Cumbernauld
- Woodfield Systems Ltd. - Whitstable
- Woodville Polymer Engineering Ltd - Swadlincote
- Worldwide Oilfield Machine (U K) Ltd. - Aberdeen
- Worldwideworker.com - London
- Worleyparsons Europe Ltd. - Brentford
- Worlifts Ltd - Bromsgrove
- Wright Engineering Co (Stratford-upon-Avon) Ltd - Stratford upon Avon
