Hi chris,
sorry to hear about your colleague.
I can’t help regarding location-but date I reckon mid 1950’s.
My reasoning being that as he doesn’t have his wings, that picture will have been taken in his first few years of service. And after 1952 as alluded to by chevron.
Looks like he’s a Flying Officer in the photo (hard for me to be sure vs pilot officer as im looking at the photo on my iPhone).
If born in 1934 and joined age 18-ish as a Pilot officer, adding a few years to get to Flying Officer, would indicate a mid 1950’s date.
Or, if he joined as a Flying Officer after Uni, aged no less than 21, then that would suggest a mid 1950’s date.
Edited to add;
His daughter should be able to obtain his service records
HERE
She should be able to obtain units he served at etc as well as when he got promoted to various ranks-which will hopefully help.
Also, details of anyone commissioning are published in the London Gazette-so that should indicate when he got his commission and in what rank he commissioned. Website
HERE
Hope that helps.