I did send for the RAF record quite recently. Most of it was redacted ie next of kin, names, addresses etc. so I didn't pay much attention to it.
On the Previous Engagement Section it says the following:
"Army Reserve Section "D"
19.03.23 to 18.03.27"
So looks like Medal Card man is not mine. Plus wrong badges etc. Hope I haven't wasted anybodies time, though I still don't know what his uniform was. He married my grandmother in 1921 in Liverpool so the studio photo must be earlier than this when he still lived in Wales.