I am Craig Peacock, Ken can be contact at the Pymble address, he has historical information on the Wagga Peacock family, and has some information I think on John Edmondson. My father and his family referred to him as "Jack". His mother was Maude Hurst which puts them on my maternal side. They moved away from Wagga prior to WW2 to commence dairy farming. Apparently his actions at Tobruk were completely out of character, he was a rather shy boy and very close to his mother, he was also an only child.
Hope this helps