Labour MP and challenger for Leader of the Labour party, Andy Burnham (C), arrives to deliver a speech in Manchester, northern England, on June 29, 2026. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham (R), arrives to deliver a speech in Manchester, northern England, on June 29, 2026. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, arrives to deliver a speech in Manchester, northern England, on June 29, 2026. (Photo by Toby Shepheard / AFP via Getty Images)

LONDON, ENGLAND - JUNE 29: Conservative leader Kemi Badenoch delivers a speech on the economy at the Victory Services Club on June 29, 2026 in London, England. The leader of the Conservative Party delivered a speech on the economy at the same time as labour leadership hopeful Andy Burnham also sets out his stall to the country. (Photo by Dan Kitwood/Getty Images)

A worker supported on safety ropes paints the facade of an apartment building in Singapore on June 29, 2026. (Photo by Roslan RAHMAN / AFP via Getty Images)

Business woman Lidiia Muslim poses for a photocall upon arrival to attend the Jacquemus "Le Bohneur" collection fashion show in L'Ile-Rousse on the French Mediterranean island of Corsica on June 29, 2026. (Photo by Pascal POCHARD-CASABIANCA / AFP via Getty Images)

Deputy Labour party leader Lucy Powell (L) greets Manchester City Council leader, and Labour party candidate for the forthcoming Manchester mayoral election, Bev Craig, ahead of a speech by Labour MP and challenger for Leader of the Labour party, Andy Burnham, in Manchester, northern England, on June 29, 2026. (Photo by Toby Shepheard / AFP via Getty Images)

LONDON, ENGLAND - JUNE 29: Conservative leader Kemi Badenoch delivers a speech on the economy at the Victory Services Club on June 29, 2026 in London, England. The leader of the Conservative Party delivered a speech on the economy at the same time as labour leadership hopeful Andy Burnham also sets out his stall to the country. (Photo by Dan Kitwood/Getty Images)