I assumed this was Harry Dempsey, briefly a Scottish League referee, who came from Bishopbriggs, a stop or two along from Croy.
A.McKenzie suggests the FIFA referee Alistair, who started in Coatbridge, subsequently moving to Larbert.
Ronnie Gordon also made the referees' list, as did Tom Kellock, by then of East Kilbride.
Is that the same Harry Dempsey who subsequently relocated to the Manchester area, maybe Stockport, and became a FL linesman ? If so, he was later than that. I encountered him after his relocation but whilst he was still an active official, and that was in 1984.