If no candidate gets an overall majority, all but the top two candidates are knocked out and a run - off takes place. (politics.co.uk)
All these results are within the range of sampling error, but at the very least they suggest that Labour will not get an overall majority in the House of Commons and may not even be the largest party. (theconversation.com)
But to get an overall majority at the next election, the Tory vote is going to have to do more than just hold firm. (lordashcroftpolls.com)