Bury St Edmunds has a smattering of old buildings in the Gothic style but also some Art Deco. This is a very thirties Marks & Spencer:-

Betfred has Art Deco leanings in the slight overhangs:-

But the exemplar has to be The Works, which exhibits the rule of three in the windows which in addition have great deco glass, with sunburst effect above:-

Detailing:-

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The Works was right beside this Tudor/mediæval style building which now houses W H Smith’s:-