Question: The 2011 epic historical drama film set in Roman Britain was adapted by a man who wrote two plays for who?

Context paragraphs:
Cleopatra (1963 film): Cleopatra is a 1963 American epic historical drama film chronicling the struggles of Cleopatra VII, the young Queen of Egypt, to resist the imperial ambitions of Rome.  It was directed by Joseph L. Mankiewicz and shot in the 70 mm Todd-AO format, with a screenplay adapted by Mankiewicz, Ranald MacDougall and Sidney Buchman from a book by Carlo Maria Franzero.  The film stars Elizabeth Taylor, Richard Burton, Rex Harrison, Roddy McDowall, and Martin Landau.

The Right Stuff (film): The Right Stuff is a 1983 American epic historical drama film.  It was adapted from Tom Wolfe's best-selling 1979 book of the same name about the Navy, Marine and Air Force test pilots who were involved in aeronautical research at Edwards Air Force Base, California, as well as the Mercury Seven, the seven military pilots who were selected to be the astronauts for Project Mercury, the first manned spaceflight by the United States.  "The Right Stuff" was written and directed by Philip Kaufman and stars Ed Harris, Scott Glenn, Sam Shepard, Fred Ward, Dennis Quaid and Barbara Hershey.  Levon Helm is the narrator in the introduction and elsewhere in the film, as well as having a co-starring role as Air Force test pilot Jack Ridley.

Ben-Hur (1959 film): Ben-Hur is a 1959 American epic historical drama film, directed by William Wyler, produced by Sam Zimbalist for Metro-Goldwyn-Mayer and starring Charlton Heston as the title character.  A remake of the 1925 silent film with the same name, "Ben-Hur" was adapted from Lew Wallace's 1880 novel "".  The screenplay is credited to Karl Tunberg, but includes contributions from Maxwell Anderson, S. N. Behrman, Gore Vidal, and Christopher Fry.

John Jackson (writer): After leaving Cambridge University, John Jackson developed and script edited the ITV soap Night and Day.  Altogether he wrote 35 episodes for the TV Series.  In 2009 he wrote the episode "The King Is Dead, Long Live the King…" for the BBC One series Robin Hood.  From 2010 to 2012 he wrote two episodes of the serial drama Lip Service.  From 2011 until 2013 he wrote three episodes for the supernatural drama Being Human.  This brought him a Writers' Guild of Great Britain award for Best TV Drama Series.  He also wrote two episodes for the "Being Human" spin off Becoming Human.  In 2014 Jackson wrote an episode for another BBC Three series, In the Flesh.

1900 (film): 1900 (Italian: "Novecento" , "Twentieth Century") is a 1976 Italian epic historical drama film directed by Bernardo Bertolucci, starring Robert De Niro, Gérard Depardieu, Dominique Sanda, Sterling Hayden, Alida Valli, Romolo Valli, Stefania Sandrelli, Donald Sutherland, and Burt Lancaster.  Set in Bertolucci's ancestral region of Emilia, the film is a praise of communism and chronicles the lives of two men during the political turmoils that took place in Italy in the first half of the 20th century.  The film was screened at the 1976 Cannes Film Festival, but was not entered into the main competition.

Urumi (film): Urumi (Malayalam: ഉറുമി ) is a 2011 epic Indian historical drama film directed, filmed and co-produced by Santosh Sivan and written by Shankar Ramakrishnan.  It stars Prithviraj Sukumaran, Prabhu Deva, Genelia D'Souza, Amol Gupte, Jagathy Sreekumar, Nithya Menon, and Alexx O'Nell in lead roles and features Tabu, Arya and Vidya Balan in extended cameos.  The soundtrack includes songs composed by Deepak Dev.

Ponnar Shankar (film): Ponnar Shankar is a 2011 Indian epic historical drama film produced and directed by Thiagarajan.  It is a fictionalised account of the Ponnar Shankar epic, adapted from M. Karunanidhi' s novel of the same name.  It features Thiagarajan's son Prashanth in lead dual roles as warrior princes, portraying the title characters, with actresses Pooja Chopra and Divya Parameshwaran making their film debut as princesses.  The film also features an extensive cast of supporting actors with Prabhu, Rajkiran, Napoleon, Prakash Raj, Jayaram, Sneha and Kushboo amongst others.  The background score and soundtrack of the film, composed by Ilaiyaraaja, was released on 27 March 2011.

Nero and the Burning of Rome: Nero and the Burning of Rome (Italian: Nerone e Messalina ) is a 1953 Italian epic historical drama film directed by Primo Zeglio and loosely based on real life events of Roman emperor Nero.  It was based on the novel "Nerone e Messalina" (c.1949) by Harry Bluhmen.

Jeremy Brock: Jeremy Brock MBE (born 1959) is an English writer and director whose works include the screenplays "Mrs Brown", "Driving Lessons", "The Last King of Scotland", "Charlotte Gray", and "The Eagle".  Brock has also written two plays for the Hampstead downstairs theatre.

The Eagle (2011 film): The Eagle is a 2011 epic historical drama film set in Roman Britain directed by Kevin Macdonald, and starring Channing Tatum, Jamie Bell and Donald Sutherland.  Adapted by Jeremy Brock from Rosemary Sutcliff's historical adventure novel "The Eagle of the Ninth" (1954), the film tells the story of a young Roman officer searching to recover the lost Roman eagle standard of his father's legion in the northern part of Great Britain.  The story is based on the Ninth Spanish Legion's supposed disappearance in Britain.

Supporting paragraphs: Jeremy Brock The Eagle (2011 film)
Answer: Hampstead downstairs theatre