Targeting core Labour voters, May promises more workers' rights

By Elizabeth PiperLONDON (Reuters) - Prime Minister Theresa May promised on Monday to extend British workers' rights in the workplace and the boardroom, part of a push to win over traditional working class supporters of the opposition Labour Party in next month's election.May, appointed prime minister after Britain voted to leave the European Union last June, wants to seal a decisive victory for her Conservative Party in the June 8 election to strengthen her hand in the Brexit talks, but opposit