National Trust

Bedfordshire

Dunstable Downs, Whipsnade Tree Catherdral

Cambridgeshire

Anglesey Abbey, Houghton Mill, Peckover House, Wimpole Hall

Buckinghamshire

Ascott House, Claydon House, Hughenden Manor, Stowe Landcsape Gardens, Waddesdon Manor, Dorneywood Garden

English Heritage

Wrest Park Gardens, Beds, Audley End House, Essex, Kirby Hall, Northamptonshire