Tourists in front of London's Buckingham Palace tell AFP they are "shocked" by the announcement that Catherine, Princess of Wales has cancer and is in the early stages of chemotherapy, with Amy Watson, a visitor from Australia, predicting it would have "a great impact" on Britain's royal family. Kate, as she is widely known, said the discovery of cancer, after successful abdominal surgery in January, was "a huge shock" but she was "well and getting stronger every day". IMAGES AND SOUNDBITES