Sterling brushes off poll showing Conservative lead narrowing

LONDON (Reuters) - The pound inched higher on Wednesday in very thin trading, shrugging off a key opinion poll for Britain's general election that showed the ruling Conservative Party might still fail to win a majority.The narrowing of the Conservative's lead just a day before the vote cast some doubt on expectations of a definitive outcome that has boosted sterling in recent weeks. A closely watched model from pollsters YouGov indicated Prime Minister Boris Johnson was on course to win a..