Conservatives four points ahead of Labour in pre-election poll

British Prime Minister David Cameron's Conservatives have notched up a four point lead over the opposition Labour Party ahead of a May 7 election, an Ashcroft poll showed on Monday, the party's largest lead in the polling series in six weeks. If replicated across the country in the election, the lead would not be enough to give the Conservatives an overall majority, however, and was within the margin of error. The closeness of the race was underlined by two earlier polls on Monday, one