The resignation of sitting Labour MP Josh Simons on 14 May 2026, explicitly to enable Greater Manchester Mayor Andy Burnham’s candidacy, has anchored trader sentiment around a Labour hold in the Makerfield by-election scheduled for 18 June. Labour’s National Executive Committee approved Burnham for the candidate selection process the following day, with the meeting set for 21 May, reinforcing his status as the clear frontrunner at 63.5% in current pricing. Robert Kenyon of Reform UK, at 32.5%, draws support from the party’s strong showing in recent local elections across the constituency’s wards, where it captured over half the vote. The remaining listed candidates trail at 1% or below, reflecting limited momentum. The contest’s outcome will hinge on turnout in this traditional Labour seat and any further shifts in local polling before the June vote.