Hi Johnnie
If you go to
www.clewistonmuseum.org and click on No 5 BFTS Photo Archives that will take you to the University of Florida Digital Collection of pictures. Scroll down until you find the Course 10 photo, click on the zoom tag and you will see your man 3rd from the left on the 3rd row.
Then contact the No 5 BFTS Association Archivist,
Gordon Newsham who may be able to put you in touch with members of Course 10 who are still around, and who might remember Mr O'Donohoe.
I have no other knowledge of him or of Course 10.
Best of Luck with your search
Ian BB