Andy Burnham assumed the office of UK Prime Minister on Monday, succeeding Keir Starmer, and delivered an initial address from Downing Street. He appointed John Healey as chancellor, Ed Miliband as foreign secretary and Wes Streeting as defence secretary, with further junior appointments expected on Tuesday. Burnham pledged to detail cost-of-living measures the following day and to present a 10-year national plan later in the year.