My late grandfather was described to me as a civilian driver for the RAF of a Queen Mary transporter during WW2, my late mother told me he was involved in transporting airplane parts etc between RAF bases. Are there any records accessible for this type of work? I've checked military records and he doesn't show up as a military man in WW2. (He did serve in the army in WW1 and I have those records.) Suggestions as to where to check next would be welcome, thanks!