Lagan Valley.

Lagan Valley sits south-west of Belfast, a populous Northern Ireland seat of roughly 112,000 people with a median age of 40. The structured record does not break the constituency into named built-up areas, but its weight lies around Lisburn and the commuter belt that fans out from the city. Local services are split across two authorities, an unusual arrangement for a single seat. Lisburn and Castlereagh runs the bulk of it, with twenty-three of the constituency's wards, while Armagh City, Banbridge and Craigavon accounts for a further four; both are Northern Ireland council authorities.

No recent ward-election results are held on record here, so the local-government direction-of-travel cannot be read off contest by contest. The parliamentary picture is clearer, and it has moved. In 2024 the Alliance Party took the seat on 37.9 per cent, ahead of the Democratic Unionist Party on 31.9 per cent. Five years earlier the order was reversed: the DUP won on 43.1 per cent with Alliance trailing on 28.8 per cent. Sorcha Eastwood, returned for Alliance in July 2024, holds the seat on that swing, and has recorded no whipped dissent in the last ninety days.

The seat therefore appears genuinely in flux rather than settled, a unionist constituency on the older figures that turned to Alliance on a single-digit margin in 2024. The tenor of recent local coverage has been largely administrative -- rate-setting, refuse collection, planning and economic-investment business rather than political confrontation. On the figures available the contest looks live: a margin of around six points, a recent reversal of the leading party, and two councils whose own balance is not visible in the record. Whether that marks a durable shift or a single result is not something the available data can settle.