Zack Polanski's approval ratings hit a record low as his support among young voters nosedives after 'Zionism is racism' row

The Green leader's slump follows a bruising month after members voted 1,022 to 813 at conference to define Zionism as racist. Labour has said it will cut ties with Greens at council level in England and Wales unless representatives disavow the motion. Lewisham councillor Dr Rebecca Jones, a GP under investigation by the General Medical Council, is among its 745 supporters.

Dr Jones faces disciplinary proceedings over a post saying 'Burn Zionism to the ground'.

Scottish Green co-leader Gillian Mackay called the Zionism debate 'unhelpful' to peace.

Asked whether Israel had a right to exist, Mackay paused and said: 'It's a difficult one.'