Today I found this interesting site on English icons (http://www.icons.org.uk). The site seems to be the kind of public-private partnership that one wishes would happen more often. Creating win-win scenarios should not be exclusive to the private sector.
There are at least two clothing related entries (see entry on the Bowler Hat) and an interview of Swaine Adeney under The Weather icon including tidbits about their business and clientele (http://www.icons.org.uk/theicons/collection/the-english-weather/features/umbrellas).
Notably missing is an entry on Savile Row. Perhaps someone would care to nominate SR? I think the Savile Row Bespoke Association would be happy to oblige with additional information and interviews.
For further discussion, see the associated AskAndy thread.