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).
... House, Penzance[?]
Tate St. Ives[?]
Cumbria
Abbot Hall Art Gallery[?], Kendal[?]
Beatrix Potter Gallery[?], Hawkshead[?]
Cumberland Pencil Museum[?], ...