Wimpole, Cambridgeshire (Accredited Museum)
Dunham Massey, Cheshire (Accredited Museum)
Whitehurst
Calke Abbey, Derbyshire (Accredited Museum)
Beningbrough Hall, North Yorkshire (Accredited Museum)
Ormesby Hall, Redcar and Cleveland (Accredited Museum)
Snowshill Manor and Garden, Gloucestershire (Accredited Museum)
J. B. Joyce & Co
Cliveden Estate, Buckinghamshire
Nostell Priory, West Yorkshire (Accredited Museum)
Thwaites and Reed
Uppark House and Garden, West Sussex (Accredited Museum)
Chirk Castle, Wrexham (Accredited Museum)
John C. Moon Handley
Polesden Lacey, Surrey (Accredited Museum)
Leonard Tennant
Clandon Park, Surrey
Vyne Estate, Hampshire (Accredited Museum)
Cotehele, Cornwall (Accredited Museum)