The Queen's official composer Sir Peter Maxwell Davies is undergoing chemotherapy for leukaemia.
Sir Peter, 78, whose music was played at William and Kate's wedding, recently returned to his home in Orkney after a spell in a London hospital.
He said: "The treatment has been a battle and I admit I have found it tough at times. But I am determined to keep on working. In fact I've been busy on my 10th symphony in hospital and when I went back home to Sanday."