D & S Services   (Arundel)
	D S P S Ltd   (Braintree)
	D&D International Valves Ltd   (Bury St Edmunds)
	DAB Pumps Ltd  (Bishops Stortford)
	Dairy Pipe Lines  (Essex)
	Dalling Automation  (Huntingdon)
	Danfoss Ltd  (Denham)
	Dansk Mink Papir A/S
	Dantherm Filtration Ltd (Airmaster Engineering)  (Bamber Bridge, Preston)
	Datalogic Scanning, Inc  (Eugene, USA)
	Datamars
	Davidson Clark Ltd  (London)
	DavyMarkham Limited  (Sheffield)
	Dawson  (Thetford)
	Dawson Downie Lamont  (Glenrothes)
	De Montfort University Leicester (DMU)  (Leicester)
	Delavan Spray Technologies  (Widnes)
	Delkor Ltd  (Paulton)
	Delta Controls Inc. (formerly Delta Flow Systems)  (Surrey, Canada)
	Delta Pacific Valves Ltd   (Bury St Edmonds)
	Deltek Vision  (London)
	Denman Instrumentation Ltd  (Hull)
	Department for Environment Food and Rural Affairs  (London)
	Deprag Schulz GMBH u. CO  (D-92224 Amberg, Germany)
	Derbyshire Hose & Fittings Ltd  (Chesterfield)
	Derek Plumb & Partners   (Sale)
	Derwent Water Systems Ltd  (Derbys)
	Desmarsal Limited  (Newport)
	DESMI Limited  (Newcastle)
	Deva Manufacturing Services Ltd  (Chester)
	Dewpoint Air Services (formerly Hankison UK)  (Sheffield)
	DeZurik International Ltd  (Cramlington)
	DH Industries Limited  (Laindon)
	Diametric Technical Limited  (Swanmore)
	Dickson  (Addison, USA)
	Dietrich Engineering Consultants  (1023 Crissier, Switzerland)
	Dinnissen Process Technology  (Sevenum, The Netherlands)
	Dixon Europe Ltd  (Preston)
	Domino UK Ltd  (Cambridge)
	Donaldson Europe  (Leuven, Belgium)
	Donaldson Membranes  (Newton Le Willows)
	Doosan Babcock Energy Ltd  (Crawley)
	Doriflon Ltd  (Newton Aycliffe)
	Dormer Tools Ltd  (Sheffield)
	Dorr Oliver  (Croydon)
	Dovianus BV  (Bergschenhoek, The Netherlands)
	Dow Corning Corporation   (Midland, USA)
	Drake & Scull Engineering (UK) Ltd  (Gateshead)
	Drayton Tank & Accessories Ltd   (Telford)
	Dresser Flow Solutions, DI UK Ltd  (Uxbridge)