Nothing post war but did find a few more details about his service.
http://www.specialforcesroh.com/show...cDonald-Edward
Edit : The last entry is :
1 SAS (A Squadron) 1942-43 (2 Lt - Lt)
As the site is "dedicated to the memory of Special Forces from World War 2 to the present who served and died in places and under circumstances most of us can only imagine in our worst nightmares" perhaps they have more information ?