YouGov’s Final-Week MRP Puts Reform on a 30% Share Across the West Midlands — 45% in Cannock Chase, 43% in Nuneaton and Tamworth, Labour Wiped Below a Third of Its Defending Seats, and the Modelled Loss Is Now 1,941 Councillors on a Realised Distribution Worse Than 2009

YouGov’s 2026 local elections multilevel-regression-and-poststratification model, published at 7am Thursday, runs a sample of 67,140 respondents through 2,969 ward-level estimates and arrives at three numbers that will define the next seven days: Reform UK on a 30% vote share in the West Midlands, 45% in Cannock Chase, 43% in Nuneaton and Tamworth, and a national Labour fall from first to fifth on 616 seats. The seat-loss point estimate, on the YouGov central model, is 1,941. The lower bound on Labour’s loss is 2009. The upper bound has not happened in the post-war record.

What the model finds

The 67,140-respondent sample, fielded between 18 and 28 April, places Reform UK on a 26% national share across the contested English councils, ahead of the Conservatives on 22%, the Liberal Democrats on 18%, the Greens on 16% and Labour on 14%. The fragmentation is the headline. Labour’s 14% is a 21-point fall from the 35% the party recorded at the 2024 general election, and a 6-point fall on the same MRP run in February. The Conservative number masks a regional reverse: the party loses Surrey, Buckinghamshire and Hampshire to the Liberal Democrats while pulling parity in Lancashire and the East Midlands. The Reform geography is the West Midlands, the East Midlands and the Lincolnshire coast. The Greens take Bristol, Hackney council seats outside the principal authorities, and a single county council in Somerset.

The Cannock number

The 45% modelled Reform share in Cannock Chase is the highest single-authority share for any party in any post-war YouGov MRP. The methodology is conservative: the constituency-level estimate is regressed against demographic poststratification cells, and the sample size for the West Midlands subregion is 6,841, well above the threshold for a published estimate. The Reform candidate slate in Cannock includes a former Conservative association chair, a serving Stafford Borough councillor and a businessman who has run twice for the Police and Crime Commissioner role. The Labour-held Cannock Chase district council has been a national Labour banker since 1973. On the YouGov number, the council changes hands by Friday morning May 8.

What it means for Starmer

Pat McFadden’s private polling, two officials told Politics Lookout earlier this week, has the Labour seat-loss range between 1,400 and 2,100. The YouGov number sits inside that range, towards the upper end. The lower bound, 1,400, is the worst Labour locals since 1992. The point estimate, 1,941, is the worst Labour locals since 1934. The Prime Minister will be in Salford Friday, the North East tomorrow and Birmingham Saturday. The whip’s office has been told to expect a Sunday morning leadership challenge if the realised seat loss is above 2,000. The whip’s office has been told nothing about what happens if it is below 1,400. That number is not on anyone’s reading of the room.

Reform’s parliamentary group question

A council-control change of the magnitude YouGov is modelling carries a parliamentary echo. Reform UK has five MPs. The party’s internal projection, which leaked to the Sunday Times last weekend, is that a 30% West Midlands share translates into a Westminster vote-share floor of 22% in the same region. The party’s plan, on the read of three Reform officials Politics Lookout has spoken to in the last week, is to use the May 8 morning to announce a Senedd group of three, a Holyrood group of two, and to declare a target of seven by-election candidates in Labour-held Midlands seats by the end of June. The arithmetic is performative. The signal is that Reform now believes it has the council infrastructure to fight a general election in 2027 from a base of councillors and not just headlines.

What the Conservatives lose

The Conservative loss in the YouGov model is masked by the headline number. The party defends 1,083 council seats. The MRP loses it 487 of them. The losses are concentrated in the Home Counties and the Cotswolds. Surrey County Council, on the YouGov geography, returns a no-overall-control finish with the Liberal Democrats as the largest party. Buckinghamshire is on the same trajectory. The Hampshire result, on a turnout adjustment, is too close to call. Kemi Badenoch will be in Tonbridge Friday and Aldershot Saturday. The Conservative ground operation, four weeks ago judged the strongest in a decade, is being out-leafleted in five of the seven banker authorities. The Sunday morning numbers, when they come, will be the worst Conservative locals since 1995. They will not be the headline. Labour’s number is the headline.