Britain’s presumptive prime minister painted in broad strokes in a major Westminster speech — but behind the scenes aides are working frantically to put a detailed program together.

For now, Andy Burnham is the most popular man in Westminster. But how long he can hold onto that title depends on what he does next as the political reality sets in

The frontrunner to become Britain's next prime minister, Andy Burnham, plans to lay out his economic agenda on Monday, in his first major policy announcement since Keir Starmer…