Royal Army Medical Corps (RAMC) [????- ]
Their actions in Hong Kong during the Second World War are described in a booklet titled:
In Oriente Fidelis. The Army Medical Services in the Battle of Hong Kong, December 1941.
It is written by P. H. Starling, and published by the RAMC Historical Museum, (now named The Museum of Military Medicine). Thanks to Barbara Johnson for letting me know about it.