Catherine, Princess of Wales’ uncle Gary Goldsmith is appearing on Celebrity Big Brother while his famous sister is recuperating from a “serious” abdominal surgery. Although some are eager to hear what the outspoken businessman may have to say about Prince Harry and Meghan Markle, others criticize his timing. “I mean the royals have had a really rubbish time of it late lately,” former Big Brother contestant Kerry Katona told an outlet. “I feel like putting somebody like Uncle Gaz in there, he’s really not going to help matters. I mean especially what’s going on with King Charles and Princess K…