~67–70% · $320K liquidity
Will Keir Starmer remain UK PM through 2026?
Leadership-continuity anchor market
Politics Prediction Markets
Does Starmer hold on? Does Reform top a national poll — or does Britain head to an early election? Prediction markets price the UK’s 2026 political outcomes as binary contracts on Polymarket and Kalshi. Mantis shows the sharpest cross-venue line in one search.
Live cross-venue odds for leadership, polling, and election timing. Probability ranges reflect the cross-venue spread as of June 2026 — click any market for real-time quotes.
~67–70% · $320K liquidity
Leadership-continuity anchor market
~57–60% · $180K liquidity
The Farage insurgency vs the major parties
~12–15% · $220K liquidity
Snap-election risk (next is due by 2029)
Starmer’s majority and internal party management drive the leadership and election-timing markets. Crises and confidence votes are the catalysts.
Reform UK’s polling trajectory is the year’s biggest story. By-elections and defections move the "leads a national poll" market sharply.
Growth, the fiscal position, and gilt markets shape the government’s popularity — and feed back into every UK political market.
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As of mid-2026, prediction markets price Keir Starmer remaining prime minister through 2026 at roughly 67–70% on Polymarket, Reform UK leading at least one national poll near 57–60%, and a 2026 UK general election around 12–15% (the next is not due until 2029, so it would require an early dissolution). Mantis shows the live cross-venue spread.
Reform UK’s rise has scrambled the traditional two-party dynamic, and a Reform-led national poll would be a milestone signaling realignment. The market is a clean way to track that insurgency without betting on a specific election outcome — and it moves on by-elections, defections, and polling swings.
A UK parliament can run up to five years, so with the last election in 2024 the next is not due until 2029. A 2026 election would require an early dissolution — a government collapse, a confidence-vote loss, or a PM’s choice to go early. That’s why the market sits low; it’s effectively a political-instability gauge.
Polymarket and Kalshi both list UK leadership, election, and polling outcomes as binary contracts. Polymarket carries deeper liquidity on the headline Starmer and Reform markets. Mantis queries both venues in real time and routes you to the best price with referral codes intact.