The Princess of Wales is undergoing treatment for cancer, she has confirmed, in an emotional video message in which she tells others battling the disease “you are not alone”. Kate spoke about the “huge shock” of the medical development and how her family have experienced an “incredibly tough couple of months” and at times her voice cracked with feeling. The princess was admitted to hospital for abdominal surgery on January 16 and at the time her condition was thought to be non-cancerous but tests after the successful operation found cancer, the type of which has not been disclosed. The future …