The Green Party of England and Wales has returned a donation made by its own leader, Zack Polanski, after determining it was inadmissible under UK electoral law, BBC News reported on 26 June 2026.

Under the Political Parties, Elections and Referendums Act 2000, parties may only accept donations from permissible sources — a category that, for individuals, requires entry on the UK electoral register. Polanski did not meet that threshold, obliging the party to decline his contribution and report it to the Electoral Commission, as the legislation requires.

The Independent reported the Greens as the first major British party blocked from accepting a donation from its own leader. The Telegraph similarly described the episode as, to the best of available knowledge, without precedent among the mainstream parties.

The permissibility rules are not obscure. They sit at the heart of the post-Neill Committee transparency regime and are familiar to any party treasurer or compliance officer. A leader falling outside them is, to put it gently, an unusual administrative outcome — and one the party's governance structures might reasonably have anticipated before the donation was tendered rather than after.

For Polanski, elected Green co-leader in 2024 and confirmed as sole leader thereafter, the episode lands at an awkward moment. The Greens have positioned themselves as the party of principled politics and institutional reform. A compliance failure involving the leader's own finances, however procedurally routine in its resolution, is a reputational gift to opponents and will require straightforward answers about why his electoral-register status was not confirmed in advance.

The mechanics of the return are themselves unremarkable: inadmissible donations must be sent back within 30 days of receipt, and the party is required to notify the Commission. Failure to do so carries civil and, in aggravated cases, criminal liability. On the evidence available, the Greens followed the correct procedure. The question sitting awkwardly in the background is why the donation was accepted in the first place.