Question: Who wrote the movie that Philip Hill-Pearson and David Tennant collaborated on?

Context articles: Double Income, No Kids Yet
Gargoyle Club
The Exterminators (audio drama)
United (2011 film)
The Wedding of Sarah Jane Smith
Philip Hill-Pearson
Clare Tennant
David Tennant
Tenth Doctor
Victor Glynn

Double Income, No Kids Yet is a British radio sitcom written by David Spicer and originally broadcast on BBC Radio 4 from June 2001 to November 2003.
 There were three series of six episodes each starring David Tennant as Daniel and Elizabeth Carling as Lucy, a childless couple in a world of people with children.
The Gargoyle Club was a private members' club on the upper floors of 69 Dean Street, Soho, London (at the corner with Meard Street), founded in 1925 or 1928 (sources vary) by the aristocratic socialite David Tennant, the brother of Stephen Tennant and the war poet Edward Wyndham Tennant.
The Exterminators is a Big Finish Productions audio drama based on the long-running British science fiction television series "Doctor Who".
 David Tennant plays the lead role of Galanar.
 Tennant would later go on to star in the revived television series as the tenth incarnation of the Doctor.
United is a British television film directed by James Strong and written by Chris Chibnall.
 It is based on the true story of Manchester United's "Busby Babes" and the aftermath of the 1958 Munich air disaster, with the film's events taking place between August 1956 and May 1958.
 In particular, the film focuses on the experiences of assistant manager Jimmy Murphy, played by David Tennant, and Bobby Charlton, played by Jack O'Connell.
The Wedding of Sarah Jane Smith is a two-part story of "The Sarah Jane Adventures".
 It was first broadcast on BBC One on 29 and 30 October 2009.
 It is the third serial of the third series.
 It guest stars David Tennant as the Tenth Doctor, marking the first appearance of parent programme "Doctor Who"'s main character in a spin-off show.
 Filmed after "The End of Time", the episode includes the final scenes David Tennant recorded during his tenure as the Doctor.
Philip Hill-Pearson is a British actor.
 He trained at East 15 Acting School, graduating in 2009.
 Shortly after graduating from the drama school, he was cast as Bruce Donnelly in the comedy drama series "Shameless".
 Following on from this, he went on to work in a range of differing television programs, including Good Cop and Doctors, and also films such as United, with David Tennant, and Steven Spielberg's adaptation of Michael Morpurgo's War Horse.
 Alongside his extensive work in British film and television, Pearson also worked with the Hull Truck Theatre on their stage production of The Rise and Fall of Little Voice in 2011, playing the role of Billy.
Clarissa Tennant, known as Clare Tennant, later Clare Tennyson, and Clare Beck) (1896-1960) was an English socialite, prominent in early 20th century high society in London.
 She was the daughter of Edward Tennant, 1st Baron Glenconner and sister of Edward, Stephen and David Tennant.
 Tennant was originally married to Adrian Bethell, then Lionel Tennyson, 3rd Baron Tennyson, and in later years, was the wife of James Montgomery Beck.
 In her younger years she was often seen at the prestigious Ritz Hotel in London, dining with the likes of Cynthia Asquith, Osbert Sitwell, Gilbert Russell and Maud Nelke.
 Mary Abbott describes her as a "notorious 'bolter'".
David Tennant (born David John McDonald; 18 April 1971) is a Scottish actor and voice actor.
 He is best known for his roles as the Tenth Doctor in the British television series "Doctor Who", Alec Hardy in "Broadchurch", Giacomo Casanova in the TV serial "Casanova", Kilgrave in "Jessica Jones", and Barty Crouch, Jr.
 in the film "Harry Potter and the Goblet of Fire".
 In addition to his appearances on screen, he has worked as a voice actor and in theatre, including Prince Hamlet in a critically acclaimed 2008 stage production of "Hamlet" and as the voice of Scrooge McDuck in the new "DuckTales" series starting in 2017.
 In January 2015, Tennant received the National Television Award for Special Recognition.
The Tenth Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television programme "Doctor Who", who is played by David Tennant in three series as well as nine specials.
 As with previous incarnations of the Doctor, the character has also appeared in other "Doctor Who" spin-offs.
 In the programme's narrative, the Doctor is a centuries-old Time Lord alien from the planet Gallifrey who travels in time in his TARDIS, frequently with companions.
 When the Doctor is critically injured beyond medical repair, he can regenerate his body; in doing so, his physical appearance and personality change, and a new actor assumes the role.
 Tennant's portrayal of the Doctor is of an outwardly charismatic and charming adventurer whose likable and easygoing attitude can quickly turn to righteous fury when provoked.
Victor Glynn, an award-winning film and television producer and writer, was born in Balham, London on 11 October 1956.
 He is married to Oxford-based publisher and photographer Sophie Goldsworthy.
 His first wife Lorna Gillian (Gill) Glynn (née Hastilow) died in 1999.
 He has four children.
 His daughter Harriet is a film executive who has worked with, among others, Morgan Freeman and the late B.B.King and his son Phin is a film producer who is working with David Tennant and Elisabeth Moss on a movie about R.D.Laing.
 His elder daughter Katie is a school teacher.
 His youngest son Alfie is at school in Oxfordshire.
 He was a second cousin of the comedian and actor Dick Emery.