While 9 never wore tweed, Christopher Eccleston did. 

Possibly no actor managed to wear more tweed on screen at one time than Basil Rathbone did as Sherlock Holmes.  He has a Tweed suit, cape and deerstalker cap.  I don’t know for sure, but I’d bet his undies were tweed as well.  Also, it is due to Basil, that I have chosen the font “Baskerville” to be the official font of Oh, my tweedy steed.

The first post at Oh, my tweedy steed has to be Gilbert, the hero of Alfred Hitchcock’s 1938 film The Lady Vanishes.  Gilbert is an anthropologist so the tweed fits with his academic side.  He gets himself into a scrape involving a pretty lady (whose love of l’ascots could probably inspire a whole other tumblr) and an international spy ring.  So he’s romantic and adventurous, a side of tweed that we don’t see often enough.  Furthermore, Gilbert is to my mind the quintessential British hero: helpful, sardonic, brave and incredibly sexy.  All things that tweed can be if a fabric can be brave or sardonic.  He hides his chivalrous nature under a facade of reverse snobbery and practicality (and what could be more practical than good old tweed?)