Labour is on track for its worst local election performance, data analysed by the Guardian shows, in a blow that will pile further pressure on Keir Starmer’s leadership. Barring a drastic change in fortunes, Labour’s vote-share could fall to historic lows across elections for councils in England and devolved parliaments in Wales and Scotland on 7 May, with big gains for Reform, the Greens and nationalist parties, according to recent polling. The collapse in support is particularly existential in the race for the Welsh parliament, the Senedd, which Labour has dominated since its creation in 1999. Polling shows Labour’s vote...