Relatives in the RAF- confirmation sought

[P.F.]

There is a story in our family that 2 members served with the RAF, at different times. Is it possible to confirm if they joined up?

If anyone can assist, their details are:

Vincent Clerkin, 31.08.1912-00.00.19?? (lived in Co. Durham)

John Clerkin, 00.00.1936-00.03.2016

Both originated in Co. Monaghan, Ireland. Vincent was John's uncle. 

Based on their dates of birth Vincent may have served in WW2 and John probably in the 1950s/60s, but this is merely a guess. 

Kind regards,
Pierce