Paul McCartney is the first U.K. musician to be worth 1 billion pounds ($1.27 billion), according to the annual Sunday Times Rich List published Friday. The former Beatle ranked 165th overall on the newspaper’s annual list of the U.K.’s 350 wealthiest people, coming in ahead of King Charles III himself, who was ranked at 258th with an estimated personal net worth of 610 million pounds ($773 million). McCartney, 81, saw his wealth grow by an estimated 50 million pounds ($63 million) since last year, according to the Sunday Times, thanks to the rising value of his music catalogue, his 2023 Got B…