I live in New England in the USA, where there is little opportunity to be exposed to Tweedy things. One of my band mates (I'm a musician) has been in London recently, and he has sent me regular picture updates of his "tweed adventures." Here is a selection:
These are from the Stumper & Fielding shop
on the Portabello Road, London
This photo was taken at the Thomas Farthing shop, near the British Museum. On receiving this photo, I immediately asked my friend to purchase the Donegal tweed bowtie for me (second to bottom).