By Rose Hill Kate Middleton will be watching Celebrity Big Brother from “behind the sofa”, her uncle said as he made his debut during the live launch this evening. Self-made millionaire Gary Goldsmith, 58, stepped up to the Big Brother house to be locked away with the likes of Louis Walsh and Fern Britton. Carole Middleton’s brother has not been shy when it comes to revealing his thoughts on Prince Harry and Meghan, so the Palace will likely be concerned over exactly what he’ll spill when he takes part in the show. Joining hosts AJ Odudu and Will Best on the ITV show today, he was quizzed on w…