‘We can win here’: Zack Polanski presses the flesh in Holborn and St Pancras

<p>Polanski is confident of taking seat vacated by Keir Starmer, but says he will stay on as Green party leader even if he loses</p><p>Zack Polanski has said he will remain as Green party leader even if he loses the Holborn and St Pancras byelection in a high-stakes contest for the