Fulton Mackay
William Fulton Beith Mackay OBE was a Scottish actor and playwright, best known for his role as prison officer Mr. Mackay in the 1970s sitcom Porridge.
Mackay was born in Paisley, Renfrewshire, Scotland. He was brought up in Clydebank by a widowed aunt after the death of his mother from diabetes. His father was in the NAAFI.
Source: Wikipedia