What to know about who could succeed Keir Starmer as UK prime minister

British Prime Minister Keir Starmer faces a leadership crisis over his appointment of Peter Mandelson as ambassador to the U.S. The release of files related to Jeffrey Epstein suggests damaging details about Mandelson, putting Starmer's position at risk. However, ousting a Labour leader requires support from 80 lawmakers, and no clear challenger has emerged. Potential contenders include Health Secretary Wes Streeting, former deputy prime minister Angela Rayner, Greater Manchester Mayor Andy Burnham, Home Secretary Shabana Mahmood, and Energy Secretary Ed Miliband. Each has unique strengths and challenges in potentially succeeding Starmer.