Next leader out of power before 2027? (No Orban)

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Market context

The UK political landscape is undergoing a rapid shift as Prime Minister Keir Starmer announced his resignation on Monday, yet he will remain in a caretaker role until a new Labour leader is appointed, meaning he has not permanently ceased occupying the office required for this market to resolve [1][4]. This distinction is critical because the market rules explicitly exclude temporary or interim continuations in power, such as the case of Gabriel Attal in France, which mirrors Starmer’s current status [2].

Historically, similar leadership transitions in the UK, such as the 2016 departure of David Cameron, involved a permanent exit from office only after the successor was fully sworn in, not upon the announcement of resignation [1]. Comparable cases where leaders remained as caretakers, like Yoon Suk Yeol’s brief impeachment suspension, were ruled as temporary and did not trigger resolution, reinforcing why the current crowd-implied probability sits at 0% for any leader leaving permanently before 2027 [2].

Traders should monitor the official Labour leadership election commencing on 9 July, specifically whether Andy Burnham secures the required backing of 81 MPs to become the unopposed leader and thus the new Prime Minister, which would finally mark Starmer’s permanent removal [1][3]. The key catalyst is the formal appointment date, not the resignation announcement, and any early general election call before the end of 2026 could alter the timeline, though no such election is scheduled until 2029 [7][8]. Recent reports from TIME confirm Burnham is on course to replace Starmer, but the transition must be completed before the settlement window closes to qualify [3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, 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.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on PolyGram?

Zero. PolyGram 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, PolyGram triggers a quick verification flow that finishes in minutes.