Bold pledges, upbeat mood and informality: What we learned from Andy Burnham’s first day as Britain’s leader

London —  Britain’s new Prime Minister Andy Burnham entered 10 Downing Street on Monday, making few detailed policy statements but offering plenty of clues about the nature of his premiership. Optics mean a great deal in politics, so on Burnham’s first day in the job, he delivered bold pledges, without constraining himself to timelines, showcased a …