Clacton by-election: Margin of Victory

Platform comparison

Market context

Nigel Farage's resignation from his Clacton seat will trigger a by-election in one of the UK's most reliably Conservative constituencies. The seat has been held by the Conservative Party since 2005, though Farage's tenure since 2019 has made it a personal fiefdom rather than a traditional party stronghold. The margin-of-victory metric here measures the percentage-point gap between first and second place, meaning a 17% implied probability suggests traders expect a decisive outcome rather than a close contest.

Historical precedent matters for calibrating expectations. Farage won Clacton with a 25-point margin in 2019 and a 20-point margin in 2017, both landslide performances. Conservative by-elections in safe seats typically see reduced turnout and fragmented opposition, yet Clacton's unusual dynamics—Farage's personal brand, potential Reform UK candidacy, and shifting coastal demographics—create genuine uncertainty about whether the traditional Conservative machine can replicate those margins. The 2023 general election saw Labour surge nationally but still finish third in Clacton behind both Conservative and Reform candidates, providing a baseline for modelling second-place competition.

Traders monitoring this market should track candidate announcements, particularly whether Reform UK fields a challenger and whether the Conservative Party can retain the seat without Farage's personal vote. Writ timing and campaign spending disclosures will signal resource allocation. The settlement window extends to August 2026, allowing for substantial information accumulation before the election itself. Programmatic approaches should weight turnout volatility—by-elections are notoriously unpredictable on participation—and monitor opinion polling if conducted, though local by-election polls often prove unreliable predictors of actual margins.

Methodology

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

Resolution & payout

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UK Frequently Asked Questions

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How does resolution work?

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