I went to a site called Family History that I have sometimes used and
have my first family tree on there. It is the one that the Mormon Church
supports. I was looking for something else but remembered to search John
Thomas Lee and it came up that he and his wife Mary McBlain had a son,
John Robert Lee who died in Germany in 1944 on Dec 6, at the age of 22.
I then searched the Commonwealth War Graves Commission website where I
found that John Robert Lee had the rank of Pilot Officer , served in the
Royal Canadian Air Force , Squadron 424 and his grave number was listed
as 16 F 5-6 Reichwald Forest War Cemetery. It listed the same death date
and I am thinking this might be the person you were trying to find. It
is strange that he has not turned up in census records as yet.
Hopefully you will be able to tie this in to your research.