Buscot and Coleshill Estates, Oxfordshire
Nunnington Hall, North Yorkshire
G.E.C.
Plas Yn Rhiw, Gwynedd
Philips
Gents' of Leicester
Standen House and Garden, West Sussex
Ferranti
Ightham Mote, Kent
Bateman's, East Sussex
Cotehele, Cornwall
Souter and the Leas, Tyne and Wear
Sterdy
Hitachi
Greenway, Devon
Hatchlands Park, Surrey
Lanhydrock, Cornwall
Orford Ness, Suffolk
Dunham Massey, Cheshire
Killerton, Devon
Garrard Engineering & Manufacturing Co. Ltd
His Master's Voice
Polesden Lacey, Surrey
Cliveden Estate, Buckinghamshire
Ericsson
Vyne Estate, Hampshire
Sheringham, Norfolk