Looking at the YouGov MRP further:
North West: Labour 57 of 73 seats, Reform UK 6. Labour hold 88% of their 2024 North West seats, against 39% in the West Midlands and 6% in Wales.
Greater Manchester: Labour 24 of 27. Reform UK are second in 18, and four Labour seats are within two points of Reform UK.
London: Labour win 51 of 75 seats, down 8 from 2024. The Conservatives take six seats from Labour in central, north and west London, but lose Romford and Hornchurch and Upminster to Reform UK, finishing on 13. Reform UK win four seats in the east: Bexleyheath and Crayford, Dagenham and Rainham, Hornchurch and Upminster, and Romford.
Greens win 9 seats: the 4 they hold, plus 5 from Labour, each by five points or less.
Wales: Plaid Cymru 15, Reform UK 14, Labour 2, Conservatives 1.
Scotland: SNP 40, Labour 7, Lib Dems 5, Conservatives 3, Reform UK 2.
Changes w/September 2025
Fieldwork 23 August to 18 September 2026, n=14,000