With Labour sliding and the Tories moribund, this is the first true five-party election

A byelection in a normally safe Labour seat was Keir Starmer's first big electoral test as Labour leader. A similar scenario now provides his first test as prime minister. The loss of Hartlepool to Boris Johnson's Conservatives in 2021 provoked the biggest crisis of Starmer's time as opposition leader, forcing sweeping changes in personnel and approach. The loss of Runcorn and Helsby to Nigel Farage's Reform UK could be similarly bruising. Labour ought to start as favourites, having won this socially mixed marginal corner of Cheshire by a massive margin less than a year ago. But with polls showing a Labour slump, a Reform surge and a restive, dissatisfied public, all bets are off.

- Robert Ford

The Runcorn result will set the tone for this year's round of local and mayoral elections. A Labour hold will take the pressure off a harried government; a Reform break-through will stoke the heat up further, boosting Farage's claim to be parking his tanks on Labour's lawn, and jangling the nerves of anxious Labour MPs in the restored "red wall". While Farage may hurt Labour in Runcorn, it is the Conservatives who face the most pain in this year's English local elections. Most are in blue-leaning parts of the Midlands and south, and the Tories swept the board when they were last contested in 2021, with Farage off the scene and the government riding a "vaccine bounce" in the polls. Nearly 1,000 Conservative councillors are up for re-election in May, and with Kemi Badenoch's party polling below its disastrous showing last July, hundreds look set to lose their jobs. Nearly a year on from their worst ever general election result, the Conservatives still have further to fall.