Sterling tumbles to 31-year low; oil up, stocks slip

By Rodrigo Campos NEW YORK (Reuters) - Sterling slumped to a 31-year low versus the U.S. dollar on Tuesday as concerns over Britain's separation from the European Union were compounded by renewed strength of the greenback on a recent string of better-than-expected economic data. Both Brent and U.S. crude oil rose late despite the dollar's strength on a surprise U.S. crude stockpile drawdown. Sterling hit its weakest since mid-1985, hit by a growing sense that Britain may be heading for a 'hard'