No parliamentary by-election has a confirmed date as of late October 2026, following the 8 October contest in Holborn and St Pancras triggered by Keir Starmer’s September resignation. Westminster vacancies arise through resignations via offices of profit, deaths, disqualifications, or recalls, after which the Speaker moves the writ, usually within three months. Local council by-elections occur regularly in coming weeks across multiple authorities, yet these do not affect the timing of parliamentary contests. Market participants watch for MP announcements, leadership transitions under Prime Minister Andy Burnham, or health-related developments that could prompt further vacancies before the next general election.