OP, PH's Glorious 12th will not be nearly "tweedy" enough for you. Think of it as worsted suitings material in country patterns. For all out Tweed look at Hartwist by Harrison's or for something a bit softer either Moonbeam or Glenroyal.
@ Holdfast - Holdfast I think this my favourite outfit of yours ever. Sometimes I feel your clothes look too big for you but this suit fits beautifully. ( I also like the pattern and 4btn DB)
Have a great weekend.