Senior party figures have criticised his response to a motion passed by members declaring Zionism a form of racism.

Chris Mason: Questions remain for Green Party leader Zack Polanski

The Green Party has been defeated by Labour in the Holborn and St Pancras by-election.

BBC Political Editor Chris Mason says questions remain for Green Party leader Zack Polanski over his position on a controversial motion passed at the party conference.

The motion declared Zionism a form of racism, defining it as an ideology supporting "an ethnonationalist Jewish state".