article_snippet: Study of marginal seats suggests Labour and the Conservatives are heading for electoral deadlock in May, with neither party able to govern alone.
article_snippet: At Westminster the poll suggests Labour and the Conservatives will be tied on 272 seats each - well short of the 326 needed to command a Commons majority.
article_snippet: The two pardicts ties would have a combined total of 328 seats - producing a Commons majority of just three.
highlights_snippet: Study of marginal seats suggests election heading for deadlock in May .
  