1. ITV Report

Tory poll shows Labour lead in by-election

Mensch's resignation sparked by-election Photo: PA

Labour have a commanding lead in the Corby by-election, according to a new opinion poll from former Conservative Deputy Party Chairman Lord Ashcroft.

The Labour party have an 22 point lead with 54% of respondents saying they would vote for Ed Miliband's party in the upcoming by-election. Those who said they would vote Conservative stood at 32%, down ten per centage points. The poll also revealed that the Liberal Democrats had seen a similar drop in support, down ten points to 5%.

This represents a 13-point swing from the Tories in the seat since 2010 - enough for a substantial Labour majority if it were to be repeated on a national scale at the next general election.

The Labour lead is up from 15 points in mid-August, when Lord Ashcroft first polled the constituency following the announcement from Louise Mensch that she was to stand down from parliament.

Lord Ashcroft's commentary on the findings will appear on today.

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