Electoral Dysfunction

What changes if Zack Polanski is an MP?

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Could Zack Polanski win in the St Pancras and Holborn by-election – and how crushing would a loss be to the Green Party’s momentum?

Harriet Harman, Ruth Davidson and Beth Rigby discuss – and mull over whether the whole thing will be an early headache for Andy Burnham, or a chance to prove he can regain the confidence of young left-wing voters.

Plus – Harriet responds to criticism from Kemi…