By Lord Ashcroft
So, a nail-biter in Corby. Would the Liberal Democrats keep their deposit or not? The party scraped 5% in my second poll of the by-election campaign a month ago; on the day itself they failed to reach that threshold by a handful of votes.
At that stage, Labour were 22 points ahead of the Conservatives in voting intention. This finding closely matched Andy Sawford’s 21-point margin of victory, and the Tory-Labour swing. However, the vote share of both main parties was eroded over the final few weeks of the campaign.