A Green Party activist who publicly praised Iran’s late supreme leader and campaigned in support of the Islamic Revolutionary Guard Corps (IRGC) played a key role in advancing the party’s recent adoption of an anti-Zionist policy, according to internal party reports and social media activity.

Niloufar “Nilly” Brook, a British citizen of Iranian descent and Green Party member, supported the motion passed at the party’s conference this month that labelled Zionism as a form of racism. Brook also opposed British government restrictions on the IRGC, an elite branch of Iran’s military designated as a terrorist organisation by several Western countries.

In July, Brook posted an Instagram video mourning Ayatollah Ali Khamenei, Iran’s supreme leader who was killed in a joint US–Israeli airstrike earlier this year. She described Khamenei’s legacy as reflecting “integrity and decency,” contended that he had been unfairly demonised in the West, and praised his “honour” at death. Khamenei led Iran from 1989 until his death and was widely condemned for overseeing violent crackdowns on political opposition and protests.

Brook’s involvement extended to Iran’s Resistance Rising, an activist group expressing solidarity with the Islamic Republic and its anti-imperialist stance, as well as the Iran-UK Allies Forum, which campaigns against the UK government’s decision to proscribe the IRGC under terrorism legislation. In April, Brook promoted the forum’s defence of the Iranian regime’s handling of protests in January, during which thousands of demonstrators were reportedly killed.

Her efforts were acknowledged by Animah Kosai, a Green Party council member and part of Greens for Palestine, who contributed to amending party motions opposing actions against the IRGC. Greens for Palestine rejected suggestions that attempts to influence Green Party policy on these issues were inappropriate.

The party’s response to these developments has been mixed. Caroline Lucas, former Green Party leader, criticised the party’s democratic processes as being vulnerable to entryism, a term used to describe organised infiltration by individuals seeking to push specific agendas. More recently elected MP Ellie Chowns stressed the need for vigilance against capture by extremists or racists.

Meanwhile, Hamza Egal, another Green council member, accused senior party figures of unfairly stigmatising Muslim and ethnic minority members by suggesting infiltration without adequately understanding the party’s diverse membership. He stated, "You cannot claim your members are infiltrators when you have chosen not to know who your members are."

Brook defended her activism, advocating for diplomatic engagement with Tehran. The Green Party and affiliated groups, including Kosai, Iran’s Resistance Rising, and the Iran-UK Allies Forum, were approached for comment but did not issue immediate responses.