Bath City Council
Blue Circle Industries
Cable & Wireless Group
Canterbury Cathedral
CEGB
Christ Church, Oxford
Christ’s College, Cambridge
Clwyd County Council
Compton Verney House Trust
Coventry City Council
Dal Group
Danes Hill School
Dorchester Town Council
Durrell Wildlife Conservation Trust
Edinburgh City Council
English Heritage
Gardiner Theobold
Garrick’s Temple to Shakespeare Trust
Girton College, Cambridge
Go Wild at the Warren
Hanson Cement
Hepworth Building Products
Herstmonceux Castle
Historic Royal Palaces
JCB
Jersey Museums Service
Kent Air Ambulance Trust
Kew Bridge Steam Museum
Lambeth Council
Leeds Castle Foundation
Lichfield Cathedral
Longshot Developments
MAMA & Company
The National Trust
National Botanic Garden of Wales
National Power
Newhall Projects Ltd
Novus Finitor UK
Oxford High School for Girls
Oxford Preservation Trust
Radley College
Reading University
Riverine Centre Trustees
Royal Albert Hall
Royal Horticultural Society
Royal National Orthopaedic Hospital
Royal Parks
Sensatori / Thompson
Serpentine Gallery
South West Water PLC
Tarmac
The Titsey Foundation
Tower of London
Trinity College, Oxford
Trustees of the Knowle Estate
University College London Hospital
University of East Anglia
University of Greenwich
University of Wales
University of York
Vivenda Regina NV
W.H. Smith & Son
West Historic Gardens Trust
Westminster City Council