By Jamie Roberts Prince Harry once labelled Princess Kate the “sister I never had”. Despite the Royal Family having a strained relationship at present, it’s thought Kate’s diagnosis might help reunite Harry with his family. It’s claimed he reached out in private to Kate and William following her announcement on Friday that she is currently undergoing treatment for a cancer diagnosis. While any conversation happened behind closed doors, it’s thought Harry wouldn’t have referred to his sister-in-law by “Kate”. It’s thought he never called the Princess of Wales by that name, and instead gave her …