Anglian Water

AWE Aldermaston

B & Q Plc

Bank of England

Barnardo's Property Services

Birds Eye Walls Ltd

British Broadcasting Corporation

British Sugar

Britvic Soft Drinks

Canary Wharf Management Ltd

Corus UK Ltd

Dairy Crest

Department of Environment

Everest Frozen Foods

GoodYear Tyres

Guiness Brewing

Guys Hospital Medical School

H J Heinz Co

Harefield Hospital

Hewlett Packard

Hilton Hotels

HMS Nelson

Hozelock Ltd.

ICI Agrochemicals

Ipswich Hospital

Jersey Electric Company

John Lewis

Johnson & Johnson

Kings School

Kings College Hospital

Legal & General Insurance

London Borough of Southwark

London Bus

Manor Bakeries Ltd

Marriott Hotels

McCain Foods

Metropolitan Police

Mid Kent Water

Nissan Cars (UK)

Novotel Hotels

Nuclear Electric

Proctor & Gamble

Queen Elizabeth Hospital, Barbados

RAF Mildenhall

Ricoh (UK)

RN Aircraft Yard Fleetlands

Rothmans of Pall Mall

Royal College of Physicians

Schlumberger Industries

Smith & Newphew Medical Fabrics Ltd

SmithKline Beecham

Southern Water

St Pauls Cathedral

St Thomas' Hospital

Starbucks Coffee Company

Sun Life of Canada

Tate & Lyle Europe

Thames Water

The Belfry Golf & Country Club

The Boots Company PLC

The Brewery Research Foundation

The National Trust

Unilever Ice Cream & Frozen Food Ltd

University of Cambridge

University of Oxford

Wadworth Brewery

Waitrose Ltd

Wessex Water

Whitbread Plc

Yorkshire Water Services Ltd