Ealing Southall.

Ealing Southall is a wholly urban seat in west London, built almost entirely around the Ealing built-up area, which accounts for the constituency in full and houses a population of around 119,000. It is among the most ethnically diverse seats in the country: roughly three in ten residents are White, the median age is 37, and close to two in five hold a degree. There are no competing towns here and no rural fringe; the seat is a single dense conurbation rather than a network of settlements. Local services are run by one authority, the London Borough of Ealing, which draws nine wards from this constituency.

That single-council picture is firmly Labour-leaning on the figures available. Across the most recent ward contests, held in May 2026, Labour took the clear majority of seats, with the Greens and Liberal Democrats sharing a handful and one Independent breaking through in Norwood Green; turnouts ranged widely between wards. The parliamentary picture points the same way but with a softer recent trend. Labour won the seat in 2024 on 49.1%, well clear of the Conservatives on 15.4%, though that share marks a notable fall from the 60.8% recorded in 2019. Deirdre Costigan has held the seat for Labour since 2024 and has shown no whipped dissent in recent months.

The seat therefore reads as safe for Labour at parliamentary level while the local arena looks more contested at the margins, with smaller parties and independents picking up ground. Recent local coverage has tended to dwell on scrutiny of the Labour-run council and on resident pressure over development and the pace of local services. On the figures available, anti-social behaviour, vehicle crime and drug offences all appear to run well above the constituency average, with violence and public order offences also elevated. None of this unsettles Labour's standing, but it gives the local opposition material to work with.