Plain language is promoted by the Plain English Campaign[?], an independent pressure group fighting for public information to be written in common English. The opposite is an unnecessarily complicated formulation, sometimes called gobbledygook.
... Museum[?], Cambridge
Cornwall
Barbara Hepworth Museum[?], St. Ives, Cornwall
Penlee House, Penzance[?]
Tate St. Ives[?]
Cumbria
Abbot Hall Art Gallery[?], ...