BBC Films is the feature film-making arm of the BBC.
 It was founded on 18 June 1990, and has produced or co-produced some of the most successful British films of recent years, including "Truly, Madly, Deeply", "", "Quartet", "Chef", "Salmon Fishing in the Yemen", "Saving Mr. Banks", "My Week with Marilyn", "Jane Eyre," "In the Loop", "An Education", "StreetDance 3D", "Fish Tank", "Nativity!
, Iris, Notes on a Scandal, Man Up, Billy Elliot and Brooklyn."
Twenty-One is a British-American drama film directed by Don Boyd and co-scripted by him with Zoë Heller.
 Patsy Kensit stars as the 21-year-old protagonist.
 It premiered at the Sundance Film Festival in February 1991.
 It was released theatrically later that year in the United States on 4 October, followed by a British release on 1 November.
Notes on a Scandal (What Was She Thinking?
 Notes on a Scandal in the U.S.) is a 2003 novel by Zoë Heller.
 It is about a female teacher at a London comprehensive school who begins an affair with an underage pupil.
 The novel was shortlisted for the 2003 Man Booker Prize.
Company Pictures is an independent British television production company which has produced drama programming for many broadcasters.
 It was set up in 1998 by Charles Pattinson and George Faber, colleagues at BBC Films.
 Their first film was "Morvern Callar", which was credited as a co-production with BBC Films as they had begun developing it while still employed there.
 In 2003 Company Pictures became part of All3Media.
 The founders, Pattinson and Faber, left in 2012 to set up another independent production company, and John Yorke became managing director until 2015.
 He was succeeded by Michele Buck, former joint managing director of Mammoth Screen.
The Believers is a novel by Zoë Heller first published in 2008.
 It depicts a left-wing New York family of grown-ups who have little in common.
 The patriarch suffers an unexpected stroke and falls into a coma, after which each family member tries to continue his own unconventional course in life while at the same time trying to accommodate various revelations about the dying man and assisting and supporting the other family members in their lives.
Hampstead novel is a term used – often in a derogatory sense – to describe a particular genre of English fiction.
 Journalist and literary critic Kate Kellaway has described it as "a middle-class morality novel – probably involving adultery and shallow-masquerading-as-deep."
 Author and journalist Bill Buford calls it "middle class monologue".
 A novel in this genre takes place in the affluent Hampstead area of London, or in a similar neighbourhood.
 One novelist who is particularly often associated with the Hampstead novel is Margaret Drabble.
 Other authors considered proponents of the style include Margaret Forster, Fay Weldon, Penelope Lively, Kingsley Amis, Ian McEwan, Melvyn Bragg and Zoë Heller.
Alice Bird is a British actress best known for playing Lizzy in series 2 of the ITV2 drama "".
 She also appeared in the film "Notes on a Scandal" based on the novel of the same name written by Zoë Heller.
Notes on a Scandal is a 2006 British psychological thriller-drama film, adapted from the 2003 novel of the same name by Zoë Heller.
 The screenplay was written by Patrick Marber and the film was directed by Richard Eyre and starred Judi Dench and Cate Blanchett.
 The soundtrack was composed by Philip Glass.
The Damned United is a 2009 British biographical sports drama film directed by Tom Hooper and adapted by Peter Morgan from David Peace's bestselling novel "The Damned Utd", a largely fictional book based on the author's interpretation of Brian Clough's ill-fated tenure as football manager of Leeds United in 1974.
 It was produced by BBC Films and Left Bank Pictures with additional funding from Screen Yorkshire and Columbia Pictures.
 Sony Pictures Entertainment distributed the film.
Catch-22 is a 1970 American black comedy war film adapted from the novel of the same name by Joseph Heller.
 In creating a black comedy revolving around the "lunatic characters" of Heller's satirical anti-war novel set at a fictional World War II Mediterranean base, director Mike Nichols and screenwriter Buck Henry (also in the cast) worked on the film script for two years, converting Heller's complex novel to the medium of film.

Question: What film produced by BBC Films was adapted from the 2003 novel of the same name by Zoë Heller?
Answer: Notes on a Scandal