May's Conservatives see lead slip to 17 points - Opinium poll

British Prime Minister Theresa May's governing Conservative party has a 17 point lead over Labour, an Opinium poll showed on Saturday, slightly down from last week as support for smaller parties slipped.The Conservatives were on 47 percent, up 2 points from last week, while the main opposition Labour Party gained 4 points to 30 percent - still putting the Conservatives on course for a sweeping victory in June's national election.Support for the pro-EU Liberal Democrats fell 3 points to 8 percent