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).
... Barton Museum of Village Life[?]
Northampton Central Museum & Art Gallery[?]
Norfolk
Bressingham Steam Museum[?]
East Anglia Railway Museum[?]
Strumpshaw Hall ...