St Helens South & Whiston.

St Helens South and Whiston is an urban seat in the North West, built around a single dominant centre. The town of St Helens accounts for roughly two-thirds of the constituency's population of about 93,700, with Prescot a substantial second at a quarter, and a thin rural and dispersed remainder beyond. Its population is older than the national profile, with a median age of 42, overwhelmingly White, and below the national average for degree-level qualifications. Local services are split across two metropolitan borough authorities: St. Helens, which covers eight of the wards here, and Knowsley, which holds a single one.

The local political picture has shifted sharply. Across the twenty-one most recent ward contests, held in May 2026, Reform UK took twelve, with the Liberal Democrats, a Rainhill independent grouping, Labour and the Greens splitting the remainder between them. On the figures available, that marks a clear erosion of the Labour position that long defined the borough. The parliamentary picture remains, for now, a different story: Labour held the seat in 2024 on just under half the vote, with Reform UK the runner-up some thirty points back, down from a far wider Labour lead in 2019. Marie Rimmer, Labour's member since 2015, sits within that older parliamentary settlement rather than the newer council one.

The seat therefore appears caught between two trajectories: a Westminster result that still favours Labour comfortably and a council map moving towards Reform UK. Recent local coverage has tended towards the administrative -- regeneration and town-centre fabric -- rather than the contentious. Several crime categories appear to run above the comparable average, with recorded drug offences and public order incidents the most pronounced, alongside higher violence and shoplifting figures. The combination leaves a seat that looks safe at the parliamentary level for the moment, but with local ground visibly in flux.