Is Zack Polanski Britain's Zohran Mamdani? The Green Party's Eco-Populist Gamble

Go back in time by just a single year, and the name Zohran Mamdani would have meant almost nothing to anyone outside New York’s 36th State Assembly District. Today, that young, charismatic Democratic Socialist is the mayor of America’s largest city. In the span of a few months, Mamdani has become an icon of the American left and a bogeyman for nearly every leader on the American right, with the notable exception of America’s own president. Over the next four years, his favored policies — city-owned grocery stores, a thirty-dollar minimum wage, universal public childcare — will be tested out on New York for the entire country to watch.

Under the US Constitution, Mamdani will never be president of the United States. Yet it is already clear that he is becoming a more dominant force in US politics than most state governors, senators, and cabinet officials could ever dream of being. And now, it looks as if America’s closest friend across the pond is about to get a Mamdani of its own.

His name is Zack Polanski, and since September 2025 he has served as Leader of the Green Party of England and Wales. Like Mamdani, he was barely known to his nation’s public a few years ago. Like Mamdani, allies and opponents alike have had to recognize that he is about to become a major player in British politics. He is worlds away from a traditional UK politician; his positions sit as far to the left of center as Nigel Farage’s sit to the right, and in ordinary times he would have practically zero shot at national leadership.

Key Takeaways

Zack Polanski became Leader of the Green Party of England and Wales in September 2025, winning the party’s internal contest with 84 percent of the vote despite holding only a seat on the London Assembly at the time.
Polanski’s biography breaks sharply from the Oxford-educated, establishment mold that produced recent prime ministers; he is a former actor, circus-school teacher, choir singer, and one-time hypnotherapist from Salford.
Under his leadership the Greens more than doubled their membership to over 180,000 by the end of 2025 and have polled with consistent double-digit support, sometimes approaching 20 percent.
Polanski has reshaped the Greens into an “eco-populist” movement, fusing climate concern with a wealth tax, a defense of migration, and a sweeping critique of the British establishment.
His central gamble is that public anger toward the political class — not specific policy preferences — is what drives support for outsiders like Farage, and that the same energy can power a left-wing alternative.
He is positioning the Greens to fill the gap as a deeply unpopular Keir Starmer pulls Labour rightward, while courting anti-establishment voters even in Nigel Farage’s home territory.
The comparison to Mamdani is the thesis: a once-obscure outsider with bold ideas and political savvy, riding collective frustration at a moment when the old rules no longer seem to apply.

But as the people of Britain know all too well, these are far from ordinary times. At a moment when the center-left Labour Party holds power yet draws abysmally low support from the public, Polanski is not merely a leader with unconventional new ideas — he is in the right place, at the right time, to capitalize on a historic loss of faith in Britain’s leaders. As people across the United Kingdom go looking for someone to meet a difficult moment, Polanski just might be the answer.

The Mold He Broke

Look at everyone who has led Britain across the last half-decade — Keir Starmer, Rishi Sunak, Liz Truss, Boris Johnson, and Theresa May — and they share a few things in common. Each was a high-performing, politically inclined youngster. Each benefited from an Oxford education and landed swanky early-career jobs in media, finance, law, business, or the energy sector. Each linked up with one of Britain’s two main parties — the center-right Conservatives, the Tories, in most cases, or center-left Labour in Starmer’s — and rose through the ranks until securing a place in party leadership, and then the premiership.

Finally, each of them was forced to watch their tenure end in disaster. May endured multiple votes of no confidence and left with dismal approvals. Johnson was forced to resign and then chased out of Parliament. Truss’s 49-day premiership was famously outlasted by a head of iceberg lettuce. Sunak presided over the collapse of the Tories’ fourteen-year tenure in a 2024 landslide defeat. The formula was simple — and so, it seems, was the catastrophic fall that followed.

A Different Kind of Story

Zack Polanski falls well outside that classic political mold, and to understand how, you have to begin not with his policies but with his story. Aged forty-three, he was born and raised in Salford, just outside Manchester. He was born David Paulden, into an Eastern European, Jewish-Zionist family that had adopted the surname Paulden in efforts to avoid antisemitic targeting. At eighteen, he took back the old family surname, Polanski, to restore a measure of lost family identity, and chose the first name Zack in contrast with his stepfather, who was also named David.

Growing up, he attended schools that were good but not great, including Stockport Grammar School, where he was expelled. After graduating, he went to the public Aberystwyth University in Wales, then left for America to pursue undergraduate studies at a drama school in Atlanta. From there, his path was the precise opposite of the route laid out for leaders like Johnson or Starmer.

From Stage to Soapbox

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Polanski worked as an immersive theater actor, taught at one of the UK’s only professional circus schools, and sang for the London International Gospel Choir, among other work in performance. He also spent some time as a practicing hypnotherapist. When he did engage politically, his work was strictly local, in semi-theatrical and role-playing projects with migrant and homeless communities.

As he grew into adulthood, he built a life that bore precious little resemblance to anyone who might expect to become Britain’s prime minister. He is Jewish — something he would hypothetically share with just one past prime minister, Benjamin Disraeli of the 1800s, who in fact converted to the Church of England as a child. That said, the link is not entirely novel for the modern British public, given that Keir Starmer’s wife is Jewish and the family observes Jewish traditions with their children. Beyond his faith, Polanski is a gay man with a long-term domestic partner, has been vegan for more than a decade, and was at one point only just getting by, trying to make it in London as a creative with few connections.

These personal details matter because his background, like his politics, would usually suggest a man destined never to rise to political prominence. Judging by his current trajectory, they may instead describe the early life of someone who could one day lead Britain — and the fact that he started as the polar opposite of nearly every recent leader could end up helping his case.

Climbing the Green Ladder

Polanski got his start in politics with the center-left Liberal Democrats, the UK’s third-largest party, contesting a local council election in 2015. A couple of years later he switched allegiance to the Green Party, a progressive, environmentally minded organization that broadly aligns with the global Green movement. At that time, the Greens existed on the fringes of British politics, holding just a single seat in the House of Commons through the 2010s.

For Polanski, the appeal had nothing to do with proximity to power — there was none. It was about the party’s stance against oligarchy and in favor of progressive social reform and environmental policy, positions he already held.

That fringe status showed at the ballot box. When Polanski stood for election again in 2019, voters delivered a reminder: he finished with under two percent of the vote, a predictable loss for an outside candidate. Earlier that same year, he was still getting arrested at public protests, specifically aligned with the Extinction Rebellion movement, which presses the British government to act against the degradation of the global climate and biosphere. As an inexperienced, outspoken aspiring politician from a fringe party — and still dogged by a 2013 article about his hypnotherapy work — his political prospects appeared close to zero.

The London Assembly Turning Point

That began to change in 2021, when Polanski was elected to the London Assembly. For non-UK audiences, the mechanics matter: Green voters were not concentrated enough in any single part of the city to win a local seat outright, but some Assembly members are elected on citywide votes for a party, which then brings in a set number of additional members. That year, the Greens secured enough votes across Greater London to bring in three members, with Polanski third on the list.

If you assume the story now becomes a slow climb up the ranks, think again. The thing about a party as small as the Greens is that, because of its size, its politicians do not have to win a major victory to become a leading voice within it. For Polanski, that 2021 election was enough. Very quickly, he started to make a name for himself.

By the end of 2021 he had become the Green Party’s national spokesman and succeeded in getting the London Assembly to back a major climate bill in Parliament. The bill did not pass, but a newcomer had gotten the Assembly to do something in support of Green-aligned climate policy — better than nothing.

Building an Eco-Populist Platform

The following year, Polanski ran for deputy leader of the Green Party of England and Wales and won, with Welsh support, beginning to build a more nationally oriented platform. Now able to shape policy, he started to link the party’s climate agenda with Britain’s cost-of-living crisis. In a 2022 op-ed in The Guardian, he wrote: “Our economy isn’t currently working for people, or the planet, when it could and should be doing both.” The portrait he painted — of low-wage, ordinary workers driven into poverty while a profiteering class of oligarchs collected wealth and polluted the planet — clearly resonated with a segment of the public.

At its core, Polanski’s vision shapes the Greens into an eco-populist movement. Improving the state of the world, and of the climate, remains the end goal — but the party now understands that caring about the climate is a luxury ordinary people cannot indulge if they are preoccupied with being unable to afford their homes, their food, or other elements of everyday life. Polanski has made a wealth tax a central issue and advocated for the embrace and gainful employment of migrants arriving in Britain.

He has called for the United Kingdom to gradually exit NATO and cut military spending in favor of peace and diplomacy, and, in a stark departure from his Zionist upbringing, has called for explicitly anti-Zionist action to rein in Israel. He has also called to abolish the House of Lords and advocates comprehensive reform of Parliament.

The Rise of the Greens

After Britain’s 2024 general election, the Greens were rewarded for that work. As part of a nationwide repudiation of the Tories, the party put on its best showing ever at the national level, capturing close to two million votes — over six percent of the total — and gaining three seats in Parliament, for a total of four. For reference, Nigel Farage’s Reform Party held five parliamentary seats by the election’s end. The Greens were still not a major party, but their gains had been stunning, and in a mirror image of Reform on the far right, they had become a rising force on the far left.

Polanski moved fast to capitalize. In May 2025 he announced his run for party leader, despite still serving only as a member of the London Assembly. He won in a blowout — 84 percent of the internal vote — defeating a joint candidacy by veteran Green politicians Adrian Ramsay and Ellie Chowns, who had each been elected to Parliament in 2024.

During his campaign, the party saw a surge of new members, eventually surpassing the old benchmark of 67,000. By the end of 2025, the Greens had more than doubled their membership to over 180,000 and were polling nationally with consistent double-digit support, sometimes approaching 20 percent. They also warded off the threat of a new far-left party from Jeremy Corbyn and company, and have welcomed a growing list of defectors from Labour — mostly at the local level for now, though Polanski claims parliamentarians are discussing breaking ranks.

Polanski’s Big Gamble

To weigh Polanski’s prospects, you have to place him in a wider context. He is shifting the Greens toward economic populism for the same reason he is specifically going after Keir Starmer — and for the same reason he is taking his pitch to the very area that elected Nigel Farage. This is a very unusual time in British politics, and Polanski is not treating the moment like a neutral observer.

At the heart of his political calculus is one all-important bet: that the fall of the Tories, the public fury with Starmer, and the growing embrace of Farage and Reform are not about individual policy proposals, but are rooted in a collective outrage toward the political establishment. If Polanski is right, then what the British public is really looking for is a vibrant new leader with bold ideas and the political savvy to set Britain on a better path — regardless of what that better path looks like. By that logic, Farage’s message resonates not because of his specific policies but because they are contrary to a status quo that almost all of Britain is dissatisfied with. And if you agree the status quo is wrong, then anyone who pushes against it stands a better chance of being right than the people who created the mess in the first place.

A Country Looking for an Exit

The bet stands a decent chance of working because the underlying discontent is real and broadly shared. In the mid-2020s, the UK suffers from deep political frustration that crosses party lines. Economic malaise is a major source, especially in areas beyond London, where ordinary people often feel they are merely trying to survive. Public services — above all the NHS — fall far short of expectations, while income inequality climbs.

Sentiment against the migrant community is growing fast, as social cohesion and belief in Britain as an idea drop rapidly.

The numbers are stark. In one recent poll, a mere twelve percent of Britons believed their political parties would prioritize the country over their own party interests; in another, fewer than one-third said they were satisfied with the state of British democracy itself. The mood is captured in raw form by audience comments on HomeFronts coverage of Britain’s decline: “Everything goes up except our pay.” “My daughter is a nurse in London.

Her view is, you really don’t want to be a patient at the moment… stay healthy folks!!” “We are heading towards a reality of seeing favelas pop up in Britain.” Whether or not those fears are precisely accurate, there is a reason they are believable.

Right Place, Right Time

Tactically, Polanski may have arrived at just the right moment for his ideas to catch on. He is clearly positioned to capitalize on the dissatisfaction — just look at the Greens’ recent gains. And he is advocating an openly progressive message at the very moment the unpopular Keir Starmer is shifting rightward.

As Starmer tries to win back people so disillusioned they are considering Reform, he is pulling the nominally center-left Labour Party to the right — and quite possibly breaking any remaining trust with his own base. Seeming to believe he can count on left-wing support when the time comes, Starmer is leaving a gap, and Polanski’s movement is moving to fill it.

There is also an asymmetry in his favor. Polanski is setting up an eventual confrontation between Green and Reform for Britain’s massive anti-establishment voting bloc, and he has reason to think it is winnable. In Britain and across Europe, ideologically diverse voters commonly align behind a mutually tolerable candidate whose appeal boils down to “anyone but the far right.” Rallying cries of “anyone but the far left,” by contrast, rarely carry the same potency outside explicitly conservative blocs.

That asymmetry places Polanski in a unique position: he can advocate a clear, populist, change-oriented program while also arguing against the entire political orthodoxy. That is Britain’s Zohran Mamdani, if ever there was one.

There are no guarantees. Polanski may not keep up his momentum, and overwhelming both Labour and the Tories while countering Reform is far from assured. But if recent lessons from New York City are any indication, the British voting public would be foolish to count him out. After all, it is 2026, and a thirty-four-year-old, ex-rapper, Muslim-American Democratic Socialist from Queens just shocked the world. Say what you will about Zack Polanski — he clearly has the potential to do the same.

Presented by

Simon Whistler

Simon Whistler is one of YouTube's most prolific educational creators. HomeFronts is his deep dive into geopolitics, modern conflict, military history, and the civilian and societal dimensions of global events.

Frequently Asked Questions

Who is Zack Polanski? Zack Polanski is the Leader of the Green Party of England and Wales, a post he has held since September 2025. Aged forty-three, he was born David Paulden in Salford, just outside Manchester, and took the surname Polanski at eighteen. Before politics he worked as an immersive theater actor, taught at a circus school, sang for the London International Gospel Choir, and practiced as a hypnotherapist.

Why is he compared to Zohran Mamdani? Both rose from near-total obscurity to national prominence in a short time, both are young anti-establishment figures with bold, populist ideas, and both built movements by channeling public frustration with the political class. Like Mamdani’s surprise in New York City, Polanski’s rise suggests an outsider with the right message at the right moment can upend expectations.

What are Polanski’s main policies? He has placed a wealth tax at the center of the Green platform, defended the embrace and employment of migrants arriving in Britain, called for the UK to gradually exit NATO and cut military spending in favor of diplomacy, called for explicitly anti-Zionist action to rein in Israel, and called to abolish the House of Lords alongside comprehensive parliamentary reform. He frames these as part of a major political overhaul.

How has the Green Party performed under his leadership? Polanski won the leadership in May 2025 with 84 percent of the internal vote. During and after his campaign, membership surged past the old record of 67,000 and more than doubled to over 180,000 by the end of 2025. The Greens have polled with consistent double-digit national support, sometimes approaching 20 percent, and have welcomed a growing list of Labour defectors.

What is “eco-populism”? It is Polanski’s reframing of the Green agenda. Improving the climate and the state of the world remains the end goal, but the party recognizes that ordinary people cannot prioritize the climate if they cannot afford their homes or food. Eco-populism therefore fuses environmental aims with economic populism — a wealth tax and cost-of-living relief — so that the two move together rather than in competition.

Why might his strategy succeed? Polanski is betting that British discontent is driven by collective anger at the establishment rather than specific policies. With economic malaise, strained public services like the NHS, rising inequality, and low trust in democracy — only twelve percent of Britons think parties put country over party — anti-establishment candidates gain appeal simply by opposing the status quo. As Starmer shifts Labour rightward, Polanski is moving to fill the vacated left.

Could Polanski ever become prime minister? HomeFronts does not predict it, but it no longer dismisses it. His background and politics would usually rule out national leadership, yet his trajectory — and the unusual political moment — keep the possibility open. The asymmetry that “anyone but the far right” mobilizes voters more readily than “anyone but the far left” also works in his favor as the Greens compete with Reform for the anti-establishment bloc.