Andy Burnham, the United Kingdom's likely prime minister-in-waiting, turned down an invite from President Donald Trump for the upcoming 250th anniversary of American independence, Politico reported on Monday.

A spokesperson for Burnham told Politico that he won't attend the U.S. embassy's "Great American Jubilee" at U.S. Ambassador Warren Stephens’ official residence in Regent’s Park on Tuesday due to a "scheduling clash." The swanky celebration is expected to draw dignitaries, military brass and business leaders, and will feature a performance from country music superstar Tim McGraw.

"Invitations have been sent to every major party leader," according to Politico. "Previous attendees include former Prime Minister Liz Truss, Reform UK leader Nigel Farage and outgoing U.K. PM Keir Starmer, who attended in 2023 before he entered office."

Last week, Trump sneered at Burnham, calling him a former "mayor of a town" and "extremely liberal."

Burnham was expected to be approved as the U.K.'s next prime minister on July 20, Politico reported.

Burnham wasn't the only person to turn down Trump. Pop star Katy Perry declined to perform at America250 celebrations in Brussels over the weekend.