Oil rallies as fears over Brexit abate

By Amanda Cooper LONDON (Reuters) - Oil rallied on Monday, lifted by a wave of investor confidence and a weaker dollar after polls showed a diminishing chance that Britain may vote to leave the European Union later this week. Three opinion polls ahead of Thursday's vote showed the 'Remain' camp recovering some momentum, although the overall picture remained one of an evenly split electorate. Perceived safe havens such as gold , the U.S. dollar , German bonds and the Swiss franc came under pressu