"Scotland" [kilts?]" - asks WAV. Kilts in the Highlands, tartan trews in the Lowlands — regional variations important, of course. & various kinds of bonnet for the Scots: Hieland bonnet with its ribbons, Tam o' Shanter with its bobble ...

Earlier the farmworker's smockfrock, tho only worn as work dress, was a sort of English national dress I suppose, tho only among agrarian labouring-class; but that disappeared completely in early C20.