Hero Dog Fraud?

The Imperial War Museum finds one of its exhibits has been challenged in an SAS man's memoirs. It seems the SAS man made up a story about a dog making parachute jumps, in order to keep the canine conscript from being returned to his owners. Quentin Hughes, the SAS man, died in 2004, but wrote a memoir Who Cares Who Wins in 1998. I haven't been able to establish whether it was ever actually published, and word of the hoax seems to have reached the newspapers via a "friend and colleague" named Mickey King.