I am trying to find out any information on a friends grandfather, his name was...

Sgt. William John Lennon, service number 631782, he served in the RAF for about 7 years, joined in 1940 and was apparently aircrew. She seems a bit hazy as to any other info.

I have tried every combination I know on the LG but to no avail (I don't know if he made officer) and googling only gets me to the Beatles.

Any help would be appreciated but I am not hopeful.

Many thanks in advance,