The new Labour leader says his government will deliver the biggest change in British politics for 40 years.

Andy Burnham said he had still not decided who will be in his cabinet ahead of him taking over from Sir Keir Starmer as prime minister on Monday. Asked why he had not announced his top team, the new Labour leader said: "It would be somewhat premature and would, I think, cause complete chaos if you start half a reshuffle before you're in the position." There has been widespread speculation about Burnham's cabinet picks, with Ed Miliband and Shabana Mahmood thought to be in the running to replace Rachel Reeves as chancellor. In an earlier speech after becoming party leader, the former mayor of Greater Manchester outlined his vision for government including reforms to the social care system. Reform UK leader Nigel Farage said Burnham "comes in with absolutely no mandate of any kind at all" and called for "an immediate general election so the country can decide the future". But Lib Dem leader Sir Ed Davey said he welcomed Burnham's call for a more collaborative politics, adding "my door is open". He said the Lib Dems would particularly want to see changes to the water industry, support for the NHS and changes to social care, including more help for family carers. Burnham, who returned to Parliament a month ago in a by-election, cemented his status as the sole leadership candidate after being backed by 379 Labour MPs, as well as all 11 trade unions affiliated to the party, earlier this week.