Who will be in the Burnham cabinet?

Platform comparison

Market context

Andy Burnham has appointed his first Cabinet, confirming a specific roster of ministers who will serve under his Prime Ministership. The market currently prices at 100% implied probability that the listed individual is included, reflecting the immediate public release of the full ministerial list where key figures like Shabana Mahmood and John Healey secured top posts[1]. This certainty mirrors historical precedents where new Prime Ministers, such as Tony Blair in 1997, announced their entire Cabinet within hours of appointment, leaving no ambiguity for early settlement windows.

Traders should monitor the official Monarch’s appointment letters, which formally validate these roles between Burnham’s appointment and the seventh-day deadline, though the Standard has already published the definitive in-and-out list[1]. Recent reporting confirms specific changes, including Ed Miliband moving to Foreign Secretary and the scrapping of the Science Department, which eliminates certain candidates from the pool entirely[1][2]. On Polymarket, this 100% probability appears as decimal odds of 1.00 with a 0% fee for liquidity providers, whereas Kalshi would display this as a 100% implied probability with a 1.49% fee and strict US KYC, while Betfair offers decimal odds but requires higher minimum stakes and broader identity verification for UK users.

The settlement window closes on 31 December 2026, but the critical event for resolution is the initial appointment period ending seven days after Burnham takes office. Any deviation from the published list, such as the exclusion of Liz Kendall due to departmental abolition, would instantly invalidate the 100% YES price, though current sources indicate the list is final[1]. Comparing platforms, Smarkets offers a 2% fee structure with no KYC for small trades, contrasting with Polymarket’s crypto-native access and Kalshi’s regulated US-only environment, creating divergent liquidity depths for this binary outcome.

Sources: 1 · 2

Methodology

This page compares Who will be in the Burnham cabinet? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.