(Removes ‘to’ from headline) By Huw Jones LONDON (Reuters) -Staff at Britain’s Financial Conduct Authority (FCA) went on strike for the first time on Wednesday as a protracted dispute over pay and union recognition remained unresolved. The regulator is being revamped to become what Chief Executive Nikhil Rathi has said will be a more aggressive watchdog to tackle scams and misconduct. The Unite union said the strike follows months of refusals by the FCA to listen to its workforce. “The action will start with 48 hours of continuous strike action by workers across the financial regulator in Lond…