LONDON - DATED 1986: (FILE PHOTO) The Queen Mother is seen backstage following the play "Rookery Nook" by playright Ben Travers, on the night of his 93rd birthday, in 1986 in London. The image shows the Queen Mother wearing the ring Prince Charles has given to Camilla Parker-Bowles to seal their engagement ahead of their wedding on April 8, 2005. (Photo by Anwar Hussein/Getty Images)