British Prime Minister Stammer congratulates Burnham on winning the by-election.

British Prime Minister Keir Starmer posted on social media to congratulate Andy Burnham on his victory in the Meckfield by-election. He said, "Voters have chosen the Labour Party's hopeful and optimistic manifesto, rather than a divisive and hateful one." Previously, Andy Burnham, the Mayor of Greater Manchester, won a vacant seat in the UK Parliament in a historic election, paving the way for his challenge to Prime Minister Starmer's position.