By Olivia Wheeler Strictly Come Dancing’s Gorka Marquez gives a sweet insight into his Christmas with his family on Lorraine’s upcoming festive special. Host Lorraine Kelly is airing a one-hour show on Christmas Day, which includes guests Gorka, 33, and his Strictly Christmas special partner Keisha Buchanan. Speaking to Lorraine, 64, ahead of the Christmas special, Sugababes icon Keisha, 39, explains she had just two days of rehearsals to learn the dance. The singer admits: “It was definitely much more difficult than I thought, but I had so much fun!” To which pro partner Gorka adds: “She’s a …