The ongoing parliamentary standards investigation into Nigel Farage’s undeclared £5 million donation from a major Reform UK donor provides the main catalyst for the 58.5% implied probability of another Clacton by-election in 2026. Farage resigned the seat in July to trigger the August contest he then won, pausing the probe; the Commissioner has since resumed scrutiny following his re-election. A finding of breach could lead to Commons suspension of ten days or more, activating a recall petition that, if signed by 10% of constituents, would force a further by-election. Traders appear to price in a meaningful chance this process concludes before year-end, given the timeline of standards proceedings and historical precedents for recall-triggered polls, while noting the outcome remains subject to the investigation’s findings and parliamentary timetable.