William Fulton Beith Mackay was a Scottish actor and playwright, best known for his role as prison officer Mr. Mackay in the 1970s television sitcom Porridge.

The Life and Adventures of Nicholas Nickleby is an 8½ hour-long adaptation of Charles Dickens’ 1839 novel, performed in two parts. Part 1 was 4 hours in length with one interval of 15 minutes. Part 2 was 4½ hours in length with two intervals of 12 minutes. It was originally presented onstage over two evenings, or in its entirety from early afternoon with a dinner break. Later it was presented on television over four evenings.