Welcome to NOXEN — the intelligence and education platform for the next generation. This week: the political and economic legacy of Keir Starmer, who won one of the largest majorities in British history and left office less than two years later. What happened, in numbers.
In July 2024, Keir Starmer walked into Downing Street with a majority most prime ministers only dream of. In June 2026 he announced he would step down; on 20 July he formally resigned. This is the record he leaves behind — and why a historic mandate collapsed in under two years.
Very few prime ministers have fallen as far, as fast, as Keir Starmer. His majority was large enough that some commentators speculated about the possibility of a decade of Labour government. He left it with historically poor approval ratings — and he was pushed out not by the opposition, but by his own party.
To understand the legacy, you have to hold two facts side by side. Starmer won a genuine landslide in seats. And he won it on a remarkably thin share of the actual vote. Labour took 411 seats at the general election of 4 July 2024, ending fourteen years of Conservative government — but on roughly 34% of the national vote. It was one of the largest parliamentary majorities ever secured on such a modest share of the national vote — and also one of the most fragile. A majority built on a shallow vote can drain away the moment things go wrong. They went wrong quickly.
Starmer inherited an economy scarred by years of weak growth, high debt, and the aftershocks of the 2022 mini-budget crisis. His government's central argument was that stability and "sound money" would unlock investment and growth. The person tasked with delivering that was his Chancellor, Rachel Reeves — the first woman ever to hold the office.
On 30 October 2024, Reeves delivered a Budget that would come to define the government's economic story. It announced around £40 billion in tax increases — one of the largest tax-raising Budgets in a generation. The Office for Budget Responsibility projected that the overall tax burden would rise to a post-war record high.
The single most consequential measure was the rise in employers' National Insurance. The rate businesses pay on staff wages went up from 13.8% to 15% from April 2025, and — just as importantly — the threshold at which employers start paying it was cut sharply, from £9,100 to £5,000 per employee. Together these changes were estimated to raise around £25 billion a year. Critics argued the measure would act as a tax on employment — a criticism that became more prominent as the labour market weakened through 2025 and into 2026.
The politics of the economy were made worse by one early decision above all: restricting the Winter Fuel Payment to pensioners on Pension Credit and certain other benefits, removing it from millions who had previously received it automatically. Announced in 2024 as a signal of fiscal seriousness, it became a lasting symbol of a government that seemed to ask for sacrifice without offering a clear reward. The government later came under sustained pressure to soften it — but the political damage had been done.
Growth was the entire promise. "Plan for Change," the government's flagship framework, put raising living standards and economic growth at its centre. But the numbers never delivered the transformation voters had been told to expect. Growth stayed sluggish and uneven. By early 2026, the economy was still crawling — according to the ONS, real GDP grew 0.6% in the first quarter of 2026 (January to March), an improvement on the near-flat quarters before it, but nowhere near enough to change how people felt about their finances.
Meanwhile the labour market was going backwards. ONS figures for February to April 2026 put the unemployment rate at 4.9%, with around 1.76 million people classified as unemployed — up roughly 124,000 on the year. Job vacancies fell to around their lowest level in five years. And youth worklessness climbed sharply, with the number of young people not in education, employment or training reported at more than one million — a statistic with obvious weight for anyone reading this.
Inflation, at least, was calmer than during the crisis years — CPI was 2.8% in May 2026 — but some forecasters expected it to drift back up toward 3.5% by the end of the year, and the Bank of England's Monetary Policy Committee held its base rate at 3.75% through the summer, unwilling to cut faster while price risks remained. For households, "calmer inflation" still meant prices that were high and still rising, just more slowly. The felt experience of the economy — the thing that actually moves votes — barely improved.
No account of the Starmer government is complete without Peter Mandelson. Announced as Britain's ambassador to the United States in December 2024, he took up the post in early 2025 — but his position collapsed that September, when he was dismissed after emails emerged detailing his past support for the convicted sex offender Jeffrey Epstein. It later emerged that Mandelson had failed developed vetting in January 2025, a decision the Foreign Office overturned within 48 hours. The affair reached into the heart of Downing Street and dominated the political headlines for months.
For a politician whose entire brand was competence, integrity and "grown-up government," the Mandelson affair was corrosive in a way a purely economic setback might not have been. It undercut the one asset Starmer had that his predecessors lacked: the promise that the adults were back in charge.
Everything came to a head in the local elections of 7 May 2026. The result was catastrophic for Labour. On the projected national share, the party fell to around 15% — its lowest in a 40-year series and down sharply from the general election — while Reform UK, Nigel Farage's insurgent party, topped the poll with roughly a quarter of the vote. Labour lost control of around 28 councils and more than 1,100 councillors; Reform gained some 1,450 councillors and took control of 14 councils, building on gains it had made the previous year.
The rise of Reform UK is arguably the single most important development in British politics right now. Starmer's fall was not mainly a story of voters switching to the Conservatives — the traditional opposition. Reform's surge has threatened both main parties, pulling support from disillusioned voters across the spectrum and reshaping the electoral map. Whoever governs Britain next has to answer the Reform question, not just the Conservative one.
By this point Starmer's personal ratings were among the lowest recorded for a sitting prime minister in recent British polling. Averages of the polls put his net approval deep in negative territory — around −46% by late 2025 — with some pollsters showing roughly three-quarters of the public holding an unfavourable view by early 2026. The contrast with his mandate was stark: he had governed for nearly two years, with a giant majority, and still arrived there.
What finally ended it was not the polls but the party. Through May and June 2026, the government began to come apart from the inside. Junior ministers resigned. Then Wes Streeting, the Health Secretary, resigned in mid-May, reportedly saying it would be "dishonourable and unprincipled" to stay. In June, Defence Secretary John Healey left the government amid a dispute over defence spending. Cabinet-level resignations are the clearest signal that a prime minister has lost authority — and they were arriving in clusters.
The decisive blow came from Manchester. A vacancy in the safe Labour seat of Makerfield opened the door, and on 18 June 2026 Andy Burnham — the Mayor of Greater Manchester, long seen as Starmer's most credible rival — won the by-election, returning to the Commons after nearly a decade outside Parliament. With a challenger now sitting among MPs and the party in open revolt, Starmer announced on 22 June 2026 that he would step down. He remained prime minister through the leadership transition and formally resigned on 20 July, when Burnham took over.
He leaves as the latest in an extraordinary run of instability: Burnham became the seventh person to serve as prime minister in roughly a decade — an extraordinary rate of turnover by modern British standards, in a country that once prided itself on stable government.
The core bind was fiscal. Reeves's self-imposed fiscal rules meant that every spending promise had to be paid for with tax rises or cuts. The October 2024 Budget announced roughly £40 billion in tax rises, largely through employers' National Insurance, pushing the tax burden toward a post-war record high — yet growth stayed weak and unemployment rose. A government that taxes more and delivers slow growth has the hardest possible political hand to play.
Abroad, the record was more conventional. Starmer maintained strong support for Ukraine against Russia's invasion and, in September 2025, the UK formally recognised the State of Palestine — a significant shift in British foreign policy. Foreign affairs rarely decides UK elections, and they did not save him, but they form a real part of the legacy.
Competence was the whole pitch — and it cracked. The Mandelson affair, the winter fuel controversy, and a series of reversals eroded the sense of a disciplined, professional operation. In politics, a reputation for competence is an asset you can only spend once. Once voters stop believing you are more capable than the alternative, the entire rationale for your government weakens.
The deeper lesson is about mandates. A landslide in seats is not the same as a landslide in support. Starmer's 411 seats sat on a soft, shallow vote that could — and did — evaporate. In a fragmented political landscape, with Reform UK rising, the old certainties about safe majorities no longer hold. That instability is now the defining feature of British politics.
The Real Takeaway
Keir Starmer's story is a lesson in the gap between power and authority. He had power — one of the biggest Commons majorities of the modern era. What he could never quite build was authority: the settled public belief that his government was delivering, and worth sticking with.
The economics tell most of the story. A government that had made raising living standards a central promise presided over a record tax burden, weak growth, and a jobs market that was getting worse, not better, for young people in particular. Whether that was bad luck, bad inheritance, or bad choices will be argued over for years. But the felt experience — for voters, and for the bond markets that judge Britain's public finances — was of a country that was not visibly getting better.
That is the inheritance now passing to Andy Burnham. In our next issue, we look at the new prime minister: how he took power, what he has promised, and the daunting economic maths waiting for him on day one.
See you next week,
— The NOXEN Team
Figures reflect reporting and official UK data as of July 2026 and may be revised. This issue is written for education and analysis, not as political endorsement or financial advice.
Test Yourself
Two levels of ten. Elementary checks you read it. Advanced checks you understood it.