Trying to identify the Regt/Corps for this chap. From long haired CO's side of family and they say he was Northumberland Fusiliers but to my eye it looks like RAMC?
There might be a difference in tracking him down as pre-WW1 it was NF, post WW1 RNF.Looks to me that he is wearing No 1 Dress rather than khaki SD, and a regimentally coloured side hat. The RAMC side hat was dark blue with a dark crimson crown. The two colours might not stand out as different on an old b/w photo.
As somebody has pointed out, the collar badges bear the old "King's Crown", so this would seem to date the image as no later than Coronation year, 1953, though it took a while for the new Queens Crown badges to filter through to everybody.
The photo could date from - say - 1950, and the man could quite easily still have been serving right up until the 1970s, possibly even the 80s, so the suggestion in post #10 above that he saw service in the 1960s is perfectly possible.
IMHO it's a much more recent photograph, late 1940s/early 1950s, though the condition makes it look older.There might be a difference in tracking him down as pre-WW1 it was NF, post WW1 RNF.
RNF side cap was IIRC dark green below maroon on top.
I'm clear about the RAMC badge, but if he was NF/RNF attached then the unit designation could make a difference. The cap does make it look more modern than WW1 that I will agree.IMHO it's a much more recent photograph, late 1940s/early 1950s, though the condition makes it look older.
Any allusion to the Fighting Fifth is a red herring - the RAMC badges are as clear as can be.