Great Grimsby & Cleethorpes.

Great Grimsby and Cleethorpes is an urban Humber-bank seat, anchored by the port town of Grimsby, which holds more than two-thirds of its 104,484 residents. Cleethorpes, the neighbouring seaside resort, takes most of the rest, with Humberston and New Waltham and a thin rural fringe making up the remainder. This is a two-town seat, more working coast than commuter belt, with a median age of 40 and fewer than a fifth of adults degree-educated. A single unitary council, North East Lincolnshire, runs services across all ten of its wards.

The ward picture has moved sharply. Across the ten most-recent contests, held in May 2026, Reform UK took nine, the Liberal Democrats holding East Marsh as the exception. The parliamentary picture differs in degree: at the 2024 General Election, the first on these 2023 boundaries, Labour won with 41.9 per cent against Reform UK on 28.8, a margin of some thirteen points. Melanie Onn has held the seat for Labour since, with no whipped dissent in the past 90 days.

The local direction of travel appears to be away from the established parties, and the council itself has lately changed hands, recent coverage centred on a new administration settling in and on routine resort and regeneration matters. The crime profile runs heavier than the national norm, with shoplifting and criminal damage well above the constituency average and recorded violence above it too. The 2024 result still gives Labour a buffer at Westminster, but the gap between that margin and the recent ward verdicts leaves the seat looking contested.