Princess Kate has been “focused on work” alongside Prince William amid her cancer battle, a royal historian has claimed. The Princess of Wales announced in March that she had begun a course of preventative chemotherapy following abdominal surgery at the beginning of the year. As a result, the princess, 42, has not performed any public engagements while she recuperates in private. Kate has been spending the majority of her time in Adelaide Cottage with her husband and three children. Marlene Koenig, a royal historian, spoke exclusively to GB News to explain what type of work Kate will likely pe…