The Adventures of Mr. Maximillian Bacchus and His Travelling Circus is a fantasy novel by best selling author Clive Barker.
 It is composed of four interwoven stories penned by Clive Barker during his teenage years in the Winter of 1974 that have never seen print in any form.
 The book was published by Bad Moon Books in April 2009.
Clive Barker's Jericho, sometimes referred to as simply Jericho, is a first person shooter survival horror video game with author Clive Barker providing the premise of the storyline.
 The game was released for Microsoft Windows, PlayStation 3 and Xbox 360 in 2007.
Harry D'Amour is a fictional character created by English author, filmmaker, and artist Clive Barker.
Clive Barker (born 5 October 1952) is an English writer, film director, and visual artist.
 Barker came to prominence in the mid-1980s with a series of short stories, the "Books of Blood", which established him as a leading horror writer.
 He has since written many novels and other works, and his fiction has been adapted into films, notably the "Hellraiser" and "Candyman" series.
 He was the Executive Producer of the film "Gods and Monsters".
Clive Barker's Undying is a first-person shooter survival horror video game developed by EA Los Angeles and published by EA Games.
 Noted horror author, the titular Clive Barker, was consulted in shaping the game's plot and background lore and also provided the voice of Ambrose Covenant, a character in the game.
The Damnation Game is a horror novel by English writer Clive Barker, published in 1985.
 It was written just after finishing the first trilogy of "Books of Blood", and tells a Faustian story that touches on topics such as incest, cannibalism, and self-mutilation in a frank and detailed manner.
 It was his first novel.
William Thomson Hay (6 December 1888 – 18 April 1949) was an English comedian, actor, author, film director and amateur astronomer who came to notice for his theatrical sketch as a jocular schoolmaster, known as Dr. Muffin.
 The acts in which Hay performed the schoolmaster sketch became known as "The Fourth Form at St. Michael's".
 Hay toured with act and appeared in America, Canada, Australia and South Africa.
 From 1934 to 1943, he was a prolific film star in Britain, and was ranked the third highest grossing star at the British Box Office in 1938, behind George Formby and Gracie Fields.
The Books of Abarat are a series of young adult fantasy novels written and illustrated by English writer and visual artist Clive Barker.
 The series is intended to contain five books, of which three have so far been published.
 The series takes place on the Abarat, a fictional archipelago consisting of twenty-five islands, one for each hour of the day (and one extra).
Tortured Souls, also known as "Clive Barker's Tortured Souls", is a series of six action figures and a starring the characters of the series.
 Distributed by McFarlane Toys in July 2001, the series included six monsters designed by horror author Clive Barker.
Clive Barker, Illustrator is a book of ink sketches and some full-color paintings by British author Clive Barker.
 It was published in 1990 by Arcane/Eclipse Books.
 It also contains a lengthy interview with Barker, in which he talks about the various aspects of his work.
 As with his fiction, his artwork is concerned with mythology, monstrous figures, the grotesque, human sexuality, and secret identities.
 He also discusses his influences, which range from Jean Cocteau, Goya and William Blake to various Disney movies.

Question: What other occupation is shared by English writer and visual artist Clive Barker and English comedian, actor and author Will Hay?
Answer: film director