Leigh & Atherton.

Leigh and Atherton is a constituency of former mill and mining towns in Greater Manchester, urban and overwhelmingly White, with a median age of 41 and a quarter of residents degree-educated. No single town dominates: Leigh, with some 41,700 people, makes up under two-fifths of the seat, followed by Golborne and Atherton at roughly 25,400 and 23,100, with smaller Tyldesley beyond. Local services across all four of the seat's wards are run by Wigan Council, a metropolitan borough authority, placing the constituency wholly within one tier of local government.

That single-authority footing has not insulated the seat from a marked shift at ward level. Across the four most recent contests, in May 2026, Reform UK took three and an independent the fourth, on winning shares from the mid-thirties to just over half. The parliamentary picture is more settled: Labour won the 2024 election, the first on these 2023 boundaries, with 48.5 per cent to Reform UK's 26.9 per cent. Jo Platt, of the Labour and Co-operative Party, has held the seat since, with no whipped dissent in recent months and speeches turning mainly on the economy, local government and social care.

The gap between a comfortable 2024 margin and a Reform-leaning set of ward results leaves the seat looking less secure than its parliamentary figures suggest. Recent local coverage has carried a distinctly contested tenor, and the direction of travel appears to favour the challengers locally even as Labour holds both the Westminster seat and the borough. On the figures available the constituency reads as in flux rather than safe.