Starmer out by 2025?

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Market context

Keir Starmer became Prime Minister in July 2024 following Labour's general election victory. This market tests whether he remains in post through the end of 2025, with any announcement of resignation or removal—regardless of implementation date—triggering immediate settlement to Yes. The 0% crowd probability reflects the absence of credible near-term removal mechanisms under current parliamentary arithmetic, where Labour holds a working majority and no formal leadership challenge process is underway.

UK Prime Ministers have historically faced removal through three routes: electoral defeat, backbench revolt forcing resignation, or party leadership contest. Margaret Thatcher's 1990 departure followed a confidence challenge; Tony Blair's 2004 announcement of a departure date came after sustained backbench pressure; Liz Truss lasted 49 days before resigning under market and parliamentary pressure. Starmer's position differs materially: Labour's majority, whilst slender, remains intact; no serving Cabinet minister has publicly called for his removal; and polling, whilst unfavourable, does not yet suggest imminent electoral collapse that would force his hand.

Traders monitoring this market should track three categories of event. First, Labour's parliamentary cohesion during major legislative votes—any significant rebellion on flagship bills (tax, welfare, or industrial relations) could signal deeper discontent. Second, scheduled announcements: the Spring Budget (March 2025) and any reshuffle announcements will test party unity. Third, external shocks—a major economic deterioration, security incident, or scandal involving Starmer personally—could alter the calculus. The Guardian and BBC Parliament remain primary sources for tracking backbench sentiment and formal procedural moves.

Methodology

We track Starmer out by 2025? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Deposit UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What does it cost to trade on Polymarket Deposit UK?

Zero. Polymarket Deposit UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Deposit UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.