Company Index
- W Christie and Co Ltd - Glasgow
- W Hawley and Son Ltd - Burton on Trent
- W Maass UK Ltd - St Helens
- Wachs Ltd - Sandbach
- Wade International Ltd - Halstead
- Walker Filtration Ltd / Walker Research Ltd - Washington
- Walport International Ltd - Reigate
- Walsall Chemical Co (Metal Treatments) Ltd - Willenhall
- Walter Page (Safeways) Ltd - Bedford
- Walton Pharmaceuticals Ltd - Leatherhead
- WAM Contract Services Ltd - Rochdale
- Ward Homes - Chatham
- Warner Lewis Jr - Hook
- Warren Morrison Valves Ltd - Southampton
- Wartsila UK Ltd - Aberdeen
- Warwick International Ltd - Holywell
- Warwickshire Oil Storage Ltd - Tamworth
- Water Coolers Acrokool - Saffron Walden
- Water Life Research Ltd - West Drayton
- Water Treatment products Ltd - Pontypool
- Watermota Ltd - Newton Abbot
- Watkins Hire (Manchester) - Manchester
- Watkins Hire (Scotland) - Falkirk
- Watkins Hire (Southampton) - Romsey
- Watkins Hire Ltd - Coleford
- Watkins Hire Ltd (Yorkshire) - Dewsbury
- Watson Petroleum Ltd - Lincoln
- Watson Petroleum Ltd - Wisbech
- Watson-Marlow Bredel Pumps Ltd - Falmouth
- Wayne Dresser UK Ltd - Edinburgh
- WBB Minerals - Sandbach
- Weatherford Pipeline Specialty Services - Aberdeen
- Wefco (Gainsborough) Ltd - Gainsborough
- Weglokoks Ltd - Rochester
- Weidlinger Associates Ltd - Glenrothes
- Weidmuller Ltd - West Malling
- Weir Materials Ltd - Manchester
- Weir Westgarth Ltd - Glasgow
- WEL Technical Services Ltd - Maidstone
- Weldgrip - Barnsley
- Well Service - Montrose
- Well-Flow International Ltd - Aberdeen
- 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 - Bristol
- Westford Plastics and Engineering Ltd - Wellington
- Westgate Fastenings - Great Yarmouth
- Westlakes Research Institute - Whitehaven
- Westside Welding and Engineering Ltd - Welwyn Garden City
- WH Tidesley Ltd - Willenhall
- Wheelabrator Group Ltd - Altrincham
- Whitby Tanks Ltd - Whitby
- WhitChem Ltd - Newcastle under Lyme
- White Young Green plc - Salford
- Whiteley Read Engineering - Rotherham
- WhiteLight Design Associates Ltd. - London
- Wickham Industries Ltd - Leeds
- Wickham Laboratories Ltd - Fareham
- WIETS Ltd - Oswestry
- Wilkins Campbell and Co Ltd - Dartford
- Wilkinson Computing Solutions - Ballymena
- Willacy Oil Services Ltd - Deeside
- Willenhall Tube and Forging Co Ltd - Walsall
- William Blythe Ltd - Accrington
- William Sharp (Steel) Ltd - Smethwick
- Williams Casco Ltd - Manchester
- Wilson Supply International (UK) Ltd - Great Yarmouth
- Winn and Coales (Denso) Ltd - London
- Winwood International Ltd - Aberdeen
- Wirral Fospray Ltd - Deeside
- Witham Oil and Paint Ltd - Lincoln
- Witt Gas Techniques Ltd - Warrington
- Witton Chemical Co Ltd - Bury St Edmunds
- WJ Marine Analytical Services Ltd - Great Yarmouth
- Wm Coulthard and Co Ltd - Carlisle
- Woburn Chemicals Ltd - Milton Keynes
- Wodoco Ltd - Newark
- Wolf Safety Lamp Co Ltd - Sheffield
- Wolseley plc - Reading
- Wood Group Fuel Systems Ltd - Aberdeen
- Wood Group Ltd - Aberdeen
- Wood Group Pressure Control Ltd - Peterhead
- Wood Group Pressure Controls Ltd - Cumbernauld
- Wood Group Production Technology Ltd (WGPT) - Aberdeen
- Woodfield Systems Ltd - Whitstable
- Worlds Fluids Ltd - Great Yarmouth
- Worldwide Business Solutions - Wantage
- Worldwide Oilfield Machine Ltd - Aberdeen
- Worldwideworker - Tunbridge Wells
- WorleyParsons Europe Ltd - Brentford
- WorleyParsons Komex - Bristol
- Worlifts Ltd - Bromsgrove
- Wright Engineering Co (Stratford-upon-Avon) Ltd - Stratford upon Avon
- WS Atkins plc - London
- WS Jenkins and Co Ltd - London
- Wyko ESL Group Ltd - Aberdeen
- Wyko Industrial Services Ltd - Chemical Metering Division - Aberdeen
