Note: Australia is generally considered to be a continental landmass, rather than an island. If however one does count Australia among the islands it, not Greenland, would be the largest in the world (unless one also considered Antarctica an island).
... Museum[?], Cavendish
William Clowes Printing Museum[?], Beccles
West Sussex
Amberley Working Museum, Arundel
Fishbourne Roman Palace
West Yorkshire
Museum of Rail ...