Zack Polanski, leader of the UK Green Party, has proposed a potential overhaul of the party's democratic mechanisms, calling for the leadership to be given greater control over strategic direction.
The proposal was set out in an article published in The Guardian on Sunday, after party members passed a resolution declaring Zionism racist at the annual conference on 4 October, in a divisive vote.
Polanski also failed to win a parliamentary seat in a by-election overshadowed by controversy over Israel.
The Labour Party won the election for the seat vacated by former leader Keir Starmer in Holborn and St Pancras on Friday, seeing off a strong challenge from the left-wing Greens, handing an advantage to UK Prime Minister Andy Burnham.
"Our party democracy must now evolve to meet that – creating broader participation for members, giving the leadership more responsibility for the party's strategic direction, and making our processes as robust and accessible as possible," he wrote.
"Above all, that unity must be used to serve the work of changing this country for the better," the Green leader added.
Criticism over the resolution vote
Polanski also responded to criticism aimed at him for not taking part in the vote on the resolution concerning Zionism.
"I have been asked why I was not present for the vote. The answer is that my priority was fighting in a by-election with enormous consequences for our party," he said, adding that he had devoted all his energy to the race in Holborn and St Pancras.
He acknowledged that some party members felt "abandoned" by his decision not to attend.
The Green Party resolution, which called for "the liberation of Palestine, the right of return, the Boycott, Divestment and Sanctions (BDS) movement, and a complete arms embargo on Israel", was criticised by Jewish groups, other parties and most Green MPs.
After conceding defeat in the hard-fought by-election, Polanski hit back at his critics, saying he would remain in the leadership role.
He has been banned from entering Israel after his party backed the resolution defining Zionism as racism.
