Mark and Grant,
Thanks a lot to you both for responding to my questions. I don't have much info to go on other than that the gentleman served on the ground in the UK driving trucks and ambulances and did experience living through bombing raids and came home in about 46/47. I've been surfing all sorts of sights and coming up with nothing ... most searches bring up RAF sites - understandable for WW2 searches when I know that the RCAF Squadrons joined in with RAF and that RCAF Squadrons got renamed into the "400's" Blocks to more easily identify between UK/Canadian.
I won't stop searching a bit, but the service records or talking to family members who may have heard stories and remember which Squadrons (etc) he may have served with would narrow things down a lot.
Again, thanks guys!
Karmen