Kate is “back in training” as the princess is said to be “planning [an] overseas appearance” with Prince William. The Princess of Wales’ biographer believes that the Kate will make more public appearances next year but will take a “less is more” approach. Robert Jobson, best-selling author of Catherine: The Princess of Wales, said: “From what I understand, Catherine is doing very well. She is back training at the gym and doing all the things she wanted to do.” “I do think that we will start to see a lot more of her, and that she will carry out engagements as well as continuing to work behind t…