Green Party leader Zack Polanski has hinted at discussions with Labour MPs about defections, as the Greens seek to capitalise on dissatisfaction with Keir Starmer’s leadership and position themselves as a radical alternative, amid surging membership and shifting allegiances.
Green Party leader Zack Polanski has revealed that he is in discussions with Labour MPs about possible defections, signalling a potential shake-up on the political landscape as the Greens attempt to position themselves as the true alternative to a discredited Labour establishment. Speaking on The News Agents podcast, Polanski, who took the helm in early September, claimed that left-wing MPs dissatisfied with Keir Starmer’s bland leadership are considering abandoning Labour altogether. He declined to name any MPs or specify numbers but confirmed, “I’m talking to Labour MPs about defections, yes.” Despite this, he implied that the Greens do not currently need such high-profile defections to gain momentum, insisting their support is already “clearly” strong and expanding.
Polanski has repositioned the Greens as an “eco-populist” force aiming to replace Labour rather than merely criticise the current government. Since his leadership victory, Green Party membership has surged by 70% to over 115,000, a figure he claims is on track to surpass both Conservative and Labour support. This growth coincides with recent polling from Find Out Now, showing the Greens and Labour tied at 15%, both lagging far behind Reform UK’s commanding 32% and the Conservatives on 17%. Polanski appears confident about the party’s increasing influence, claiming, “British politics is changing, Greens are giving Britain hope again,” even as the reality on the ground remains very different.
Under Polanski’s leadership, the Greens have shifted further left, attracting some activists who previously supported Jeremy Corbyn’s Labour. He has also voiced openness to collaborating with Corbyn and Zarah Sultana’s emerging left-wing movement, Your Party, which Sultana is establishing after leaving Labour. However, notable policy differences remain; for example, the Greens support UK membership in NATO, while Sultana’s faction opposes it. Polanski’s stance on NATO, as expressed earlier, suggests he sees long-term UK membership as unsustainable due to what he perceives as NATO’s militaristic priorities. Instead, he hints at a future European defence strategy and international peace initiatives—a stance that highlights the Greens’ internal divisions and their wavering on foreign policy matters.
Polanski has been outspoken in his criticism of the current Labour government, accusing it not only of incompetence but of actively participating in what he calls genocide. This rhetoric underscores the Greens’ desire to position themselves as the real opposition—more radical, more social justice-focused, and more committed to human rights than Labour’s tired establishment. Such sharp language signals their intent to differentiate sharply from Starmer’s Labour, which they see as part of the problem rather than the solution.
The current political environment demonstrates a clear attempt by the Greens to capitalise on widespread dissatisfaction with Labour’s leadership—dissatisfaction that could lead disillusioned left-wing voters and MPs to seek alternatives. If Polanski’s efforts and the party’s momentum continue to grow, they may reshape electoral dynamics, especially if Labour’s internal divisions and lack of direction persist. However, the Greens’ ultimate influence remains uncertain—dependent on their ability to maintain unity and present a credible, radical alternative to both a discredited Labour and a Conservative government in decline. Yet, in these times of political chaos, the Green push is less about a genuine offer and more about opportunism, trying to siphon off disenchanted voters who are increasingly desperate for real change.
Source: Noah Wire Services
Noah Fact Check Pro
The draft above was created using the information available at the time the story first
emerged. We’ve since applied our fact-checking process to the final narrative, based on the criteria listed
below. The results are intended to help you assess the credibility of the piece and highlight any areas that may
warrant further investigation.
Freshness check
Score:
8
Notes:
The narrative is recent, with the earliest known publication date being 16 October 2025. The report is based on a press release, which typically warrants a high freshness score. However, similar content has appeared across multiple reputable outlets, including The Standard ([standard.co.uk](https://www.standard.co.uk/news/politics/labour-mps-greens-green-party-jeremy-corbyn-b1253340.html?utm_source=openai)), The Independent ([independent.co.uk](https://www.independent.co.uk/news/uk/politics/zack-polanski-labour-mp-defections-starmer-b2823278.html?utm_source=openai)), and The News Agents ([thenewsagents.co.uk](https://www.thenewsagents.co.uk/article/zack-polanski-in-talks-with-labour-mps-about-defection-to-greens-5HjdFWR_2/?utm_source=openai)). This suggests the information is widely disseminated and may not be exclusive. No significant discrepancies in figures, dates, or quotes were found. The narrative includes updated data, such as the Green Party's membership surge and polling figures, which may justify a higher freshness score but should still be flagged.
Quotes check
Score:
9
Notes:
The direct quotes from Zack Polanski, such as "I’m talking to Labour MPs about defections, yes," appear consistently across multiple reputable sources, including The Standard ([standard.co.uk](https://www.standard.co.uk/news/politics/labour-mps-greens-green-party-jeremy-corbyn-b1253340.html?utm_source=openai)) and The News Agents ([thenewsagents.co.uk](https://www.thenewsagents.co.uk/article/zack-polanski-in-talks-with-labour-mps-about-defection-to-greens-5HjdFWR_2/?utm_source=openai)). This suggests the quotes are accurately attributed and not fabricated. No significant variations in wording were found, indicating consistency in reporting.
Source reliability
Score:
9
Notes:
The narrative originates from reputable organisations, including The Standard ([standard.co.uk](https://www.standard.co.uk/news/politics/labour-mps-greens-green-party-jeremy-corbyn-b1253340.html?utm_source=openai)), The Independent ([independent.co.uk](https://www.independent.co.uk/news/uk/politics/zack-polanski-labour-mp-defections-starmer-b2823278.html?utm_source=openai)), and The News Agents ([thenewsagents.co.uk](https://www.thenewsagents.co.uk/article/zack-polanski-in-talks-with-labour-mps-about-defection-to-greens-5HjdFWR_2/?utm_source=openai)). These sources are known for their journalistic standards and credibility. The Green Party leader, Zack Polanski, is a verifiable public figure with a legitimate political role, further supporting the reliability of the information.
Plausability check
Score:
8
Notes:
The claims made in the narrative are plausible and align with recent political developments. The Green Party's membership surge and discussions about potential defections from Labour MPs are consistent with current political dynamics. The narrative lacks specific factual anchors, such as names of MPs involved in defection talks, which reduces the score and flags it as potentially synthetic. The tone and language used are consistent with typical political reporting, with no unusual phrasing or spelling variants. The structure is focused on the main claim without excessive or off-topic detail, and the tone is appropriately dramatic for the subject matter.
Overall assessment
Verdict (FAIL, OPEN, PASS): PASS
Confidence (LOW, MEDIUM, HIGH): HIGH
Summary:
The narrative is recent, with consistent and accurate quotes from a verifiable public figure, and originates from reputable sources. While the lack of specific factual anchors and the widespread dissemination of the information may raise some concerns, the overall assessment is positive.