She was d of Noel ROBERTSON, an Australian First World War veteran. She m 1st c1967 Martin PAGE (m annulled before 1981) and had a son, Jamie (b 1968). She m 2nd 1981 (reg Q4 London) Edward A S (b 1945 reg Q1 Surrery) s of Sir Edward George Warris HULTON (1906-88, illegt s of Sir Edward HULTON 1st Bt, so was unable to succeed & the title became extinct) and his former wife Princess Nika YOURIEVITCH (1916-95) d of Prince Sergey Alexandrovich YURIEVITCH (1875-1969) and Princess Helene LIPOVATZ (1895-1957). She m 3rd 1988 (div 1995) 15th Duke of HAMILTON &c (1938-2010).
There appear to be several versions of the name YURIEVITCH. I've gone for this version.