© Licensed to London News Pictures. 08/04/2018. London, UK. Specialist hip surgeon Sarah Muirhead-Allwood is seen leaving the King Edward VII Hospital. The Duke of Edinburgh is spending a 5th day recovering in the hospital after undergoing a hip operation on Wednesday. It is not known if Miss Muirhead-Allwood performed the operation, but she previously operated on the Queen Mother. Photo credit: Peter Macdiarmid/LNP