The Princess of Wales will celebrate her 43rd birthday on Thursday after an incredibly difficult 12 months. This time last year, Kate was admitted into hospital for abdominal surgery, only to be diagnosed with cancer and forced to undergo gruelling chemotherapy treatment, which she successfully completed in September. Such an ordeal means that the Princess's celebrations this week will be all the more special for her and her loved ones. But the date of her big day has meant King Charles had to