Hi Robbo,
If it helps i believe the photo may have been taken in the grounds of B.M.H.Bowen Road.
I did my National Service in the R.A.M.C, 1960-1962 in 27 Co ,I only spent a short period of a few days at this hospital before being moved ,to Garrison Clinic Kowloon ,and later to B.M.H.Mount Kellett.
You Could Try R.A.M.C. Museum who may be able to help.
Q.A.R.A.N.C. [Queen Alexandra's Royal Army Nursing Corps] site has a harrowing account of the way Doctors and Nurses were treated by the Japanese ,even though medics act in relative neutrality by treating all casualties on both sides.
Best Wishes and Good Hunting