Permission to hide crap, sir?

Did you know that some organisations actually give permission for geocaches to be hidden on their property?

Some of them are well-known charities, or local councils who are supposedly working in the public's interest; they are guardians of historic properties, archeologically important areas, areas of special scientific interest, wildlife preservations areas....

Most of the landowners have been persuaded to agree to this after assurances from certain geocachers that all other geocachers will follow certain rules.
How they will enforce this is not clear.

The list of organisations includes: (ref here )
Yorkshire Wildlife Trust
Milton Keynes Parks Trust
National Trust
Denbighshire County Council
Countryside Council of Wales
Amesbury Town Council, Wiltshire
Swindon Ranger Service
North Wiltshire District
South East England Forestry Commission
Wiltshire County Council
Hampshire County Council
Cheshire County Council
Warwickshire County Council
The Woodland Trust
New Forest - Forestry Commission

Some details:

Warwickshire County Council
Sally Silk
Country Parks Visitor Manager
Countryside Recreation
Tel: 01827 872660; Fax: 01827 875161
sallysilk@warwickshire.gov.uk

Wiltshire County Council
"blanket approval provided that cachers follow the GAGB guidelines..."
mentioned specifically are: Woodhenge, Figsbury Rings, Westbury White Horse, Ridgeway

Shropshire Wildlife Trust

"...trial trial basis only, starting from 1st September 2004.

Jan Mckelvey
Conservation Manager
Shropshire Wildlife Trust
Tel 01743 284280
Fax 01743 284281
www.shropshirewildlifetrust.org.uk
janmckelvey@shropshirewt.cix.co.uk"