Polanski's call to track Britons who served in the Israeli army lands in a divided Westminster

On a Friday morning BBC Radio 4 segment recorded on 10 July 2026 and aired the following day, Zack Polanski, the Green Party of England and Wales's newly elected leader, made a claim that cuts across the uneasy British consensus on the war in Gaza. "We have British citizens who could be going to that country, engaging in a genocide, and then coming back," Polanski told the Today programme, in remarks carried by Middle East Eye on 11 July. The Green Party leader used the platform to urge ministers to compile and publish a national register of British citizens who have served in the Israeli Defence Forces and, in his framing, participated in what he called genocide in Gaza — a posture that, if implemented, would be without precedent in modern UK jurisprudence.

The proposal lands in a Parliament already split on the question of how to treat returned fighters from foreign wars. British law has, for years, criminalised participation in the armed forces of a state hostile to the UK under the Foreign Enlistment Act 1870. Israel is not designated a hostile state, and ministers from successive administrations have held — formally and on the record — that there is no statutory bar to British nationals serving in friendly foreign armies. Polanski's intervention reframes the question, swapping the legal category of "hostile state" for a categorisation of conduct: not where one served, but in what operation one served.

A register, not a tribunal

The most striking element of Polanski's pitch is the proposed instrument: tracking, not prosecution. He argues that British citizens returning from service in Israel's Gaza operations should be identifiable to police and to future governments, so that evidence of any criminal conduct could be traced, with the implication that tracing itself is a precondition for accountability. The framing has been amplified by outlets sympathetic to the Palestinian cause: Al-Alam Arabic's breaking-news ticker on 11 July highlighted the call under an "Urgent" banner, citing Polanski's demand that returning British-Israeli soldiers be tracked by identifier.

The proposal sits between two existing legal traditions. One is the long-running prosecution regime under the International Criminal Court Act 2001 and the Geneva Conventions Act 1957, which allow British courts in principle to try extraterritorial war crimes. The other is the more controversial proposal advanced in jurisdictions such as France and the United States to compel disclosure of foreign-military service. The UK has not formally adopted either. Until it does, a registry of the kind Polanski proposes would require primary legislation, cooperation from the Ministry of Defence, and — most sensitively — a working definition of which Israeli operations count as qualifying service.

The politics around it

In Westminster the proposal draws a sharp line. The Green Party holds one seat at Westminster and is not in government; the party's leverage is rhetorical, not legislative. Inside the governing Labour Party, parliamentarians who have been most critical of Israel's conduct in Gaza have stopped well short of calling for a compulsory register of British-Israeli dual nationals. Several backbenchers have, in recent months, demanded sanctions against Israeli ministers and a suspension of arms-export licences — both conventional moves that fit inside the UK's established foreign-policy toolkit. A tracking scheme targeting citizens by virtue of the army they served in would, by contrast, raise immediate questions under the Equality Act 2010 and the Human Rights Act, and would almost certainly face judicial review.

Opposition Conservatives, for their part, treat the proposal as a boundary marker: Conservative MPs who have previously visited Israel with cross-party delegations have consistently framed British-Israeli dual nationals as a community whose service in the IDF is, in the words of one Jewish community Council statement carried by mainstream UK media, an expression of legitimate family and national ties. The Board of Deputies of British Jews has, in past statements on returning fighters, rejected the idea that service in a friendly state's military is a per se ground for British state interest. Its counterpart voices in the Palestinian solidarity movement will argue the inverse.

What the sources will not settle

There are facts the available reporting does not establish, and naming them is part of the picture. Middle East Eye's 11 July write-up reproduces Polanski's quote and the framing of his call; it does not name a specific British legal mechanism he is invoking, nor does it cite a precedent for the registry concept. Al-Alam Arabic's bulletin restates the demand and the genocide characterisation but adds no new evidence and no Israeli or Foreign Office response. The two sources together establish what Polanski said, where he said it, and that the claim is circulating in Arabic-language media in real time. They do not yet establish how the Ministry of Defence, the Foreign, Commonwealth and Development Office, or the Crown Prosecution Service would respond; nor do they say whether any serving British MP has co-signed the proposal.

Reporters in Jerusalem and Ramallah will also note the framing tension. Israeli government statements, including those from the IDF Spokesperson's unit and the Foreign Ministry in Jerusalem, reject the genocide characterisation as a matter of settled policy. UK government usage of the word "genocide" to describe operations in Gaza has been historically guarded; the official position of ministers since 2023 has been to call for compliance with international humanitarian law and to support ongoing International Court of Justice proceedings without endorsing the legal label Polanski uses on Radio 4. That linguistic gap is itself the story: an opposition leader speaking on a state broadcaster has adopted a term the state itself continues to refuse.

Why this argument is structural, not just rhetorical

Strip away the personalities and the question Polanski has put into British politics is older than the Green Party's current leadership. It is whether residence and citizenship in one country confers the right to participate in the warfare of another, and whether return creates an obligation on the state of citizenship. The UK has long answered that question in the affirmative for several Western militaries, including the French Foreign Legion, the US Marines, and the IDF itself; the proposed register would only apply, in Polanski's framing, where the operation in question meets a conduct test. That conduct test — the genocide characterisation — is the contested political ground, and it is the part of the proposal that the foreign-policy establishment will resist hardest.

Whether the demand goes anywhere in this parliamentary term is doubtful. Whether it has shifted the Overton window around returned foreign fighters is a different question. Inside Westminster and on the BBC, a Green leader has now articulated, on the record, a position that mainstream NGOs have approached obliquely for two years. The next moves — a Green Party policy motion, a sympathetic early-day motion from one of the smaller parties, or a Labour backbench response — will be the early test of whether 11 July 2026 is a flashpoint or a footnote.

*Desk note: The two wire feeds that surfaced this story — Middle East Eye's English-language write-up and Al-Alam Arabic's breaking-news bulletin — both carry Polanski's quote and a sympathetic framing of the registry demand. Monexus has reported the proposal on those terms and flagged the unnamed legal-mechanism question, the absence of an Israeli or UK government response, and the contested genocide characterisation in parallel, rather than treating the demand as either established policy or political theatre.

Wire provenance

This editorial synthesis draws on the following public wire/social posts:

• https://t.me/alalamarabic
• https://en.wikipedia.org/wiki/Foreign_Enlistment_Act_1870