Princess Kate has been given a huge boost in her cancer battle by King Charles’ improving health, a leading royal expert has claimed. Kate and her father-in-law have become extremely close in recent years and the relationship has deepened even further as the pair bravely fight their cancer together. And now Kate will get a huge physical and mental boost from the news that the King is recovering and able to return to public duties, helping her own fight against the killer disease, Jennie Bond told GB News. She said: “I think Catherine is very dedicated to her role, and she knows there’s been th…