Clacton by-election Winner

Platform comparison

Market context

Nigel Farage has resigned as the MP for Clacton, triggering an imminent parliamentary by-election in the Essex coastal constituency. The current market implies a 95% probability that Farage will win the seat again, a figure that aligns closely with Electoral Calculus’s projection of a 97% chance for Reform UK to hold the seat[1]. This level of certainty is rare in UK by-elections, where incumbents often face heightened volatility due to local dissatisfaction or shifting national tides.

Historically, Clacton has seen dramatic swings, most notably in the 2014 by-election when the Conservatives lost the seat to UKIP amid a surge in anti-establishment sentiment[7]. However, the 2024 general election result showed Farage securing 21,225 votes—nearly double the Conservative candidate’s tally—establishing a commanding personal majority of 8,405 votes[5]. Unlike past by-elections where the incumbent party struggled, Farage’s personal brand and Reform’s dominance in the area now frame the current 95% market probability as grounded in empirical voting behaviour rather than speculation.

Traders should monitor the official announcement of the by-election date from Tendring District Council and the formal confirmation of Farage’s candidacy, as any delay or ambiguity could shift odds[3]. Recent reporting notes Farage is “standing again” despite his resignation, but the final candidate list remains pending[2]. Divergence between prediction-market implied probability and sportsbook lines is minimal, with both reflecting overwhelming confidence in Farage, while analyst consensus from Electoral Calculus and PollCheck similarly projects a Reform hold[1][2]. No meaningful divergence exists between platforms, suggesting the market has efficiently priced the event.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Clacton by-election Winner across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 PolyGram. 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram 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.