Princess Kate’s uncle appearing on TV is “the last thing she needs”, as he may make comments “he regrets”, a royal commentator has claimed. Gary Goldsmith, Carole Middleton’s brother, is joining this year’s series of Celebrity Big Brother which will begin airing tonight. Royal commentator Phil Dampier has said that the 58-year-old businessman will likely go into the house “determined to only say nice things” about Kate and William. However, Dampier added: “After several days [Goldsmith’s] tongue may loosen and he may say things he later regrets.” The Princess of Wales, 42, underwent “planned a…