The only acceptable combinations are navy blue (no other blues), grey or charcoal (not black) suit with black shoes. There is some latitude with shirts but when in doubt, white, white, white. It matters – if you turn up looking like you’ve run round Next blindfolded then you don’t get hired, because there are several other candidates who are just as good as you but who know how to present themselves.
Think of it as a uniform. If a policeman turned out for work wearing a pink shirt he would, quite rightly, be told to get to f***. It’s no different in the City of London.
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