Wikipedia is a most unreliable source of information as they list all 6 matches in the 1956 Asisan Nations Cup as taking place in the same Stadium and the first match they record as Hong Kong v Israel refereed by H A Sheppard of England. The only other English referee Wikipedia mentions is a Tommy Tucker so I guess the photograph is of one of those two gentlemen, unless there was a third English referee present at the tournament. Some of the 6 matches do not specify a referee but as microscopist tells us this referee officiated at two matches my strong suspicion is that it is either Sheppard or Tucker.