http://www.amazon.co.uk/Well-dressed-Gentlemans-Pocket-Guide/dp/1853755699
This is a fairly useful book, although I was shocked to find a number of blatant spelling errors (the editor should never have been paid). Refreshingly, Lenius challenges a number of the old received "wisdom", such as the origins of the blazer, etc. Who really know what happened, and why? Just wear the clothes, is his view.