Britain's Prime Minister Andy Burnham (R) talks with staff during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham talks with staff during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham (C) greets a member of staff during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham (3rd L) speaks with staff, along with London Mayor Sadiq Khan (2nd L) and Britain's Secretary of State for Work and Pensions Pat McFadden (L), during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham talks with staff during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham (2nd R) helps to stack loaves of bread onto a shelf with the help of London Mayor Sadiq Khan (C) and Britain's Secretary of State for Work and Pensions Pat McFadden (L) during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham (C) talks with Sainsbury's CEO Simon Richards (L) and local store manager Aydin Gunes (R) during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)

Britain's Prime Minister Andy Burnham (C) talks with Sainsbury's CEO Simon Richards (front L) and local store manager Aydin Gunes (R) during a visit to a Sainbury's supermarket in London on August 26, 2026. (Photo by Richard Pohle / POOL / AFP via Getty Images)