RootsChat.Com

I don't think the medal rolls for the Queen's Korea Medal have been published. How sure are you that he might have gone to Korea? Only 14,198 British servicemen went as part of the UN contingent, at a time when the Army alone was 364,000 strong, so fewer than 4% served in Korea.
Your best bet is to get his service documents from the MOD and then once you have his Army number, apply to the MOD Medal Office Historical Section to see if he was awarded the Korea Medal. The number, rank, name, initials and regiment of every recipient was engraved around the edge of the medal.

This is it.

He was discharged from the RFA, but he did serve for a while. Would he have been entitled to wear a version of the uniform for a photo after the discharge? And even if not, perhaps he did it anyway.

The badly mangled restore doesn't help but possibly Small Arms School Corps.
Need to see the original.

He is in the 1911 census at 21 Upper Stanhope Street, Toxteth Park, Liverpool. There is a military record for a George Bramwell Royal Field Artillery, 3587, with that address.