comms

So I'm doing a bit of research for my partner. This is her grandad around the mid 40s. He looks like some sort of comms or radio operator. After the war he worked with planes. We don't have much info about him but that would maybe suggest the air force perhaps? I know it's not the best picture...

Hey guys, So I'm trying to apply as an Apprentice Comms rating but everytime I click on 'Apply' and I'm taken to the next page where you have to fill out what Service, Branch and Role, you want to do from the drop down menu, every apprenticeship is up there apart from Comms? Is it just a glitch...