| Birmingham City Council |
Salisbury District Council |
| Birmingham Conservation Trust |
Staffordshire County Council |
| Bournville Village Trust |
Stoke Rochford Management Ltd |
| Cadbury Trebor Bassett |
Stoneleigh Abbey Ltd |
| Chequers Trust |
Stratford on Avon District Council |
| Compton Verney House Trust |
The Churches Conservation Trust |
| Corby Borough Council |
The Englefield Estate |
| East Northamptonshire Council |
The Goldsmiths Company |
| English Heritage |
The Landmark Trust |
| Heritage Trust for the North-West |
The National Trust |
| Imagination Ltd |
The Royal Institution |
| Lincoln College, Oxford |
The Welbeck Estates Co. Ltd |
| New College, Oxford |
Warwick Castle Ltd |
| Northampton Borough Council |
Wiltshire Council |