Given Microscopist's present residence, I had assumed that it must be a Scottish referee, as he had obtained the official's permission. It did not greatly suggest any of the few Ayrshire referees of that apparent vintage and Hong Kong was a problem - the nearest I came was Lanarkshire's Hugh Young, who moved to Singapore!
I suspect that oldeagle may well be on the right lines: The referee in the photo does look rather like John Martin and as Microscopist has already informed us that he used to live near Ash, it may be that he came across, and has remained in touch with, Mr Martin from nearby Alton. Perhaps on the platform at Effingham Junction?