This is one of the main parts of looking like a true Brit. Contrary to popular belief and what you may see with your eyes, we do not dress like most countries. There are 3 types of British dress styles, pick one which suits your personality best.
The most common dress code of a current British outgoing person. They prefer the more casual suit and no tie combo, absolutely bizarre. Normally seen in just a bowler hat and occasionally if they are planning on being more uptown, they will have there top-hat on. Casual shoe wear (So heeled lace less shoes).
The Real Brit.
What a regular Brit aspires to become later in life.. these jolly chaps proudly wear there black suit and tie, with waistcoat and white shirt on. Shoes are normally fancy and decorated (beaded normally) They wear the well known Top-hat, and if showing they are really British, the monocle will be popped on so they look like a right old chap.
These dastardly foes run around in there... "Nike" ...tracksuits and ..."Nike"... trainers... the sight of these will cause a Brit to tut and a Real Brit to pull out the cane. If Nike is to expensive, they will resort to fake brands, that mimic there expensive brothers. Although they are seen as low by others due to there clothing, they see there selves as above everything else and feel they are the trend starters.