LONDON, United Kingdom(AFP) — Andy Burnham boasts man-of-the people vibes, but behind the casual exterior lies ruthless ambition and political reinvention that has helped propel him to become the UK’s next prime minister.

The 56-year-old was appointed leader of the ruling Labour party on Friday at the third time of trying, and will replace Keir Starmer in 10 Downing Street on Monday.

Ditching his signature T-shirt and casual jacket for a suit and tie, the ex-Greater Manchester mayor vowed in his acceptance speech to take “a problem-solving rather than a point-scoring approach” to government.