Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
73% | 27% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
73% | 27% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Farage 40-60% | 73% |
| Farage 60%+ | 14% |
| Farage 20-40% | 13% |
| Farage <20% | 4% |
| Count Binface | 0% |
| Other | 0% |
Market context
Nigel Farage announced his resignation as Member of Parliament for Clacton in May 2024, triggering a by-election expected within months. The Essex coastal seat has been held by Farage since 2015, when he won with 62.4% of the vote. The current market implies a 14% probability that the winning margin will exceed a threshold yet to be formally specified in settlement terms, suggesting traders expect a decisive result rather than a close contest.
Historical precedent in Clacton points toward large victory margins. Farage's 2015 win came with a 25-point lead over Labour; his 2017 general election result saw a 32-point margin over second place. The seat's demographic profile—older, Leave-voting, and strongly aligned with Reform UK messaging—has remained stable. However, by-elections frequently produce volatile outcomes; the 2022 Wakefield by-election saw Labour overturn a 3,358 Conservative majority, whilst Uxbridge and South Ruislip in 2023 delivered only a narrow Conservative hold despite polling predictions of larger swings.
The by-election date remains unconfirmed as of late 2024, with the Electoral Commission typically setting the poll for four weeks after the writ is issued. Reform UK's candidate selection and Labour's campaign intensity in a traditionally weak seat will shape turnout patterns. Local media coverage and any late-breaking national political shifts could alter the competitive landscape significantly between now and polling day.
Methodology
Sports-specific comparison page for Clacton by-election: Margin of Victory. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade Clacton by-election: Margin of Victory on Sport Prediction
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