The Green Party has suspended anti-Israel activist Tony Greenstein, citing a documented history of antisemitism and recent terrorism-related charges. Greenstein, a former member of the Labour Party who was previously expelled over antisemitism allegations, recently joined the Green Party in March 2026. He has a pending trial under the Terrorism Act 2000 for allegedly expressing support for Hamas, which is banned in Britain, and previously received a suspended prison sentence for actions linked to a defense contractor facility.

Greenstein has publicly criticized his suspension, claiming it targets him as a Jewish anti-Zionist and accusing the party of following what he described as a pattern of smears. He has a record of inflammatory statements, including denying or downplaying atrocities committed on October 7 and promoting conspiracy theories. His suspension follows internal party tensions over a proposed motion declaring Zionism to be racism, which was ultimately not voted on.

Despite the suspension, allegations of antisemitism persist against other Green Party members and candidates. Reports have highlighted social media posts from several local candidates that allegedly support extremist groups, promote antisemitic conspiracy theories, or use inflammatory rhetoric about Jewish people. Critics say the party leadership has not responded forcefully enough, while a party spokesperson has stated there is a clear distinction between criticism of Israel and antisemitism.