He was in an episode of George and Mildred in 1977. I love a bit of George and Mildred, a very underrated sitcom.
He comes in at 8.20
He was also in Super-gran. But what I did find funny when reading through his IMDB was that he was in a short in 1997 called 'Santa/Claws' which he played Santa Claus in.
No Scottish actor has really made it until they've appeared in Still Game.