Harry Dempsey was a tax inspector in Glasgow whose last match in Scotland was to referee Motherwell v Falkirk on 28th October 1972
His job took him to Chelmsford where he was listed as an F.L. linesman in 1973-74
He moved again, to Nottingham, where he is listed for 1980-81 & 1981-82
Possibly he then moved to Stockport and came off the F.L. list as he not named in 1983-84
This is all a very long time ago. However, I have a vague recollection of Harry Dempsey moving to Stockport to work for a firm of accountants that was run by a FL referee :-
https://www.accountancydaily.co/trevor-jones-driving-forceOr maybe he worked for that firm but remained resident in Nottingham ?