Overview

• Polanski defeated Adrian Ramsay and Ellie Chowns by 20,411 votes to 3,705, with turnout reported around 37% among a membership the party says is now 68,500.
• In his victory speech he told Labour “we’re here to replace you” and set out plans to tax billionaires and nationalise water companies, saying the party must take on power and wealth.
• He has said the Greens should pair substance with punchier communications, studying Nigel Farage’s cut‑through to rival Reform UK without copying its politics.
• Polanski has indicated openness to electoral cooperation with Jeremy Corbyn and Zarah Sultana’s emerging movement, framing any pact as a decision for Green members.
• Rivals warned his rhetoric risks narrowing appeal and some alleged ‘entryism’ during the campaign, claims he denied, while his non‑MP status leaves him projecting the agenda from the London Assembly as the Greens hold four Commons seats.