Llanerchaeron, Ceredigion (Accredited Museum)
Wightwick Manor, West Midlands (Accredited Museum)
Tyntesfield, North Somerset
Calke Abbey, Derbyshire (Accredited Museum)
Lanhydrock, Cornwall (Accredited Museum)
Perken, Son and Rayment (UK)
Fox Talbot Museum, Wiltshire (Accredited Museum)
Negretti and Zambra
Sinclair and Co
Contessa-Nettel
Taylor and Co.
Thornton Pickard
Zeiss Ikon
Lancaster and Sons