Claire Booth

Claire Alexandra Windsor, Countess of Ulster (born Claire Alexandra Booth on 29 December 1977) is the wife of Alexander Windsor, Earl of Ulster, only son and heir of Prince Richard, Duke of Gloucester, and Birgitte, Duchess of Gloucester. A physician by profession, she prefers to remain known as Dr Claire Booth.

Born in Sheffield, South Yorkshire, she went to King's College, London to study medicine, graduating in 2001 as Bachelor of Medicine, Bachelor of Surgery (MB BS); she subsequently graduated from University College, London as MSc in 2007 and PhD in 2012.

She is the elder child of Robert Booth, FCMI, of Weston Turville, Buckinghamshire (born 1948 at Rotherham and a scion of the ancient Cheshire Booth family) by his wife Barbara Patricia, daughter of Wilfred Robert Hitchin. She has a younger sister, Joanne Booth, who was born in 1979.

On 22 June 2002 she was married to Alexander, Earl of Ulster at the Queen's Chapel, St James's Palace. Lady Ulster qualified as a paediatric specialist registrar, after which she became a consultant paediatrician. On 1 September 2012, she was appointed Clinical Training Fellow (Walport Lecturer) at University College.

Ulster had her first child, a son, Xan Richard Anders Windsor, Lord Culloden, on 12 March 2007, and a second child, a daughter, Lady Cosima Rose Alexandra Windsor, on 20 May 2010.