Question: Who was the writer of the British sitcom starring the actor best known for his work on the sitcom "Black Adder"?

Context paragraphs:
Rowan Atkinson: Rowan Sebastian Atkinson, CBE (born 6 January 1955) is an English actor, comedian, and screenwriter best known for his work on the sitcoms "Blackadder" and "Mr. Bean".  Atkinson first came to prominence in the BBC's sketch comedy show "Not the Nine O'Clock News" (1979–82), receiving the 1981 BAFTA for Best Entertainment Performance, and via his participation in The Secret Policeman's Ball from 1979.  His other work includes the 1983 James Bond film "Never Say Never Again", playing a bumbling vicar in "Four Weddings and a Funeral" (1994), voicing the red-billed hornbill Zazu in "The Lion King" (1994), and featuring in the BBC sitcom "The Thin Blue Line" (1995–1996).  His work in theatre includes the 2009 West End revival of the musical "Oliver! ".

Robert Bathurst filmography: The filmography of English actor Robert Bathurst comprises both film and television roles spanning almost 30 years.  Bathurst made his acting debut for television in 1982 in the never-broadcast pilot episode for the BBC sitcom "Blackadder", though his character Prince Henry was recast when the "Black Adder" series was commissioned.  Throughout the rest of the 1980s, Bathurst appeared in episodes of "The Lenny Henry Show", "Who Dares Wins", "The District Nurse", "Red Dwarf", and "Chelmsford 123", before starring alongside his Cambridge Footlights colleague Stephen Fry in the short-run series "Anything More Would Be Greedy".  He also appeared in the films "Whoops Apocalypse" (1986) and "Just Ask for Diamond" (1988).

Very Big Very Soon: Very Big Very Soon is a 1991 British sitcom starring Paul Shane as Harry James, an actor's agent.  Other characters include his assistant Ernie Chester (played by Tim Wylton), Beattie, Harry's romantic interest, played by Kate David.

The Thin Blue Line (TV series): The Thin Blue Line (a colloquial term for police forces) is a British sitcom starring Rowan Atkinson and written by Ben Elton.  It aired on the BBC from 1995 to 1996.

Ryan Sampson: Ryan Oliver Sampson is an English actor best known for playing Grumio in the British sitcom "Plebs" and in Comedy sketch show, Glitchy also Alex Venables in "After You've Gone", where he played the son of Jimmy Venables, played by Nicholas Lyndhurst.  He also appeared in two episodes of Doctor Who in 2008, The Sontaran Stratagem and The Poison Sky playing Luke Rattigan.

Tony Osoba: Tony Osoba (born 15 March 1947) is a Scottish actor best known for his role as Jim 'Jock' McClaren in the popular 1970s British sitcom "Porridge".  He also appeared in its sequel "Going Straight".  Osoba was the first black Scottish actor to appear on primetime television when he appeared in the series.  Since then, he has appeared twice in Coronation Street, first as Wesley McGregor in 1982, and secondly as Mike Baldwin's boss Peter Ingram for a few episodes in 1990, before the character was killed off.

Nicholas Frankau: Nicholas Frankau (born 16 July 1954 in Stockport, Cheshire) is an English actor best known for playing the role of Flt.  Lt. Carstairs in the British sitcom "'Allo 'Allo! " whose recurring theme involves failure to get back to Britain.

David Nunn (actor): David Nunn (4 August 1962 – 26 April 2012) was a British actor perhaps best known for playing the Messenger in "The Black Adder" in 1983.

Two Up, Two Down: Two Up, Two Down is a British sitcom starring Paul Nicholas and Su Pollard.  It aired for one series in 1979 and marked the television comedy debut of Su Pollard, later to become well known as Peggy in "Hi-de-Hi! ".  It was written by Janey Preger.

Tom Owen (actor): Thomas William Stevenson Rowbotham (born 8 April 1949), also known as Tom Owen, is a British actor best known for playing Tom Simmonite on the longest-running British sitcom "Last of the Summer Wine".  He is the son of Bill Owen, who played William "Compo" Simmonite (the father of Tom Simmonite) on the show.

Supporting paragraphs: The Thin Blue Line (TV series) Rowan Atkinson
Answer: Ben Elton