Election takes edge off stocks with biggest British exposure

(Reuters) - Stocks most exposed to the British economy slipped on Wednesday on growing expectations of a close election outcome, while JD Sports dropped 10% after its top investor cut its stake.The mid-cap bourse , whose constituents make half of their earnings from business in Britain, closed 0.6% lower after dropping nearly 2% during the day.The index has gained about 3% and outperformed blue chips since lawmakers voted in favour of an election, which pollsters YouGov predicted would result..