Recent political turbulence in the UK, including multiple MP resignations tied to the 2026 Scottish Parliament elections, Labour's leadership transition following Keir Starmer's departure, and Nigel Farage's decision to trigger a by-election in Clacton, has already produced several vacancies this year. These developments, alongside routine triggers such as health-related exits and party manoeuvres, underpin trader consensus clustering tightly between six and seven total by-elections. The narrow spread reflects uncertainty over whether additional vacancies will emerge before year-end from ongoing party pressures or individual circumstances, with outcomes like five or fewer or nine or more priced lower due to historical base rates of roughly four to eight annual by-elections outside election years. Scheduled contests, such as the August Clacton vote, and any further resignations ahead of the 2029 general election could widen the range by shifting the final tally.