Career
Muir had small parts in various television programmes including The Bill, Thieftakers, Cracker, Jo Brand and Our Friends in the North. He appeared in films such as Accidental Death of an Anarchist (1983), a small film called Representative Radio in which he played the role of Joseph Goddard and The One And Only in which he played a surgeon (2002). He worked for British Broadcasting Corporation Radio for many years.
He appears as the voice of Rosencrantz in Shakespeare"s Hamlet and was the voice of Blacksmith in a television series called animated tales of the world, in 2000.
His theatre work include many years working for such establishments such as Regent"s Park Open Air Theatre and The Royal Shakespeare Company.