Your in luck,
seems he was in the RCAF,
https://www.cwgc.org/find-war-dead/c...nd-mark-david/
hence you can find a raft of information on him on ancestry.com
theres his RCAF service file,
shipping manifest, a family tree with him on it etc photos.
Sometime in the coming few months, maybe a bit longer, you may find the AIR81 for his loss appear on the UK National Archives website, and can order a copy.
http://discovery.nationalarchives.go...wse/r/h/C16484