Zack Polanski says he can pull off 'one of biggest upsets in British political history' and win Holborn and St Pancras by-election

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Zack Polanski has acknowledged that he is the “underdog” in the Holborn and St Pancras by-election but insisted that the Green Party can defy expectations and take the safe Labour seat vacated by the former Prime Minister.

The Green Party leader rejected suggestions that his party has reached the limits of its recent surge in popularity and said he hopes to pull off “one of the biggest upsets in British political history”.