Who will be in the Burnham cabinet?

Platform comparison

Market context

Prime Minister Andy Burnham has already unveiled his first Cabinet, confirming John Healey as Chancellor, Angela Rayner as Housing Secretary, and Shabood Mahmood as Home Secretary, while removing several allies of predecessor Sir Keir Starmer[1][2]. The market’s 100% YES implied probability reflects this public confirmation, as the listed individual must be appointed within seven days of Burnham’s PM appointment—a window that has now closed with the full roster published[1][2].

Historically, UK Cabinet formations resolve within 24–48 hours of a new Prime Minister’s appointment, with near-total certainty once the first list is released; the 2024 Starmer Cabinet saw similar immediate clarity after his Monday announcement[1][4]. Unlike sportsbooks that may lag on political outcomes, prediction markets here align precisely with analyst consensus, as no divergence exists between the confirmed roster and the contract’s settlement criteria[1][2].

Traders should monitor no further catalysts: the Cabinet is finalised, with Ed Miliband as Foreign Secretary, Louise Haigh as First Secretary of State, and Kanishka Narayan as the new AI Minister all confirmed[2][3]. The settlement window ends 2026-12-31, but the event has already occurred, making any further price movement irrelevant[1][2].

Sources: 1 · 2 · 3 · 4

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.