Labour MP and challenger for Leader of the Labour party, Andy Burnham, (L) acknowledges the applause after delivering a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, (R) waves as he leaves with Mayor of the Liverpool City Region Steve Rotherham, after delivering a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)

Labour MP and challenger for Leader of the Labour party, Andy Burnham, delivers a speech in Manchester, northern England, on June 29, 2026. Burnham, the frontrunner to become Britain's next prime minister, set out his economic agenda on Monday, in his first major policy announcement since Keir Starmer resigned as premier last week. (Photo by Toby Shepheard / AFP via Getty Images)