Question: What British science fiction television series had it's episode entitled "Smile" written by the winner of the 2012 Guardian Prize for "The Unforgotten Coat"?

Context articles: Stargate SG-1
Star Cops
John Christopher
Foundation (journal)
The Time of Angels
The Unicorn and the Wasp
The Torchwood Archive
Blink (Doctor Who)
Frank Cottrell-Boyce
Smile (Doctor Who)

Stargate SG-1 (often abbreviated as SG-1) is an adventure and military science fiction television series and part of Metro-Goldwyn-Mayer's "Stargate" franchise.
 The show, created by Brad Wright and Jonathan Glassner, is based on the 1994 science fiction film "Stargate" by Dean Devlin and Roland Emmerich.
 The television series was filmed in and around the city of Vancouver, British Columbia, Canada.
 The series premiered on Showtime on July 27, 1997 and moved to the Sci Fi Channel on June 7, 2002; the final episode first aired on Sky1 on March 13, 2007.
 With 214 episodes over ten seasons, "Stargate SG-1" had surpassed "The X-Files" as the longest-running North American science fiction television series, until it was surpassed by the series "Smallville" in 2011.
Star Cops is a British science fiction television series first broadcast on BBC2 in 1987.
 It was devised by Chris Boucher, a writer who had previously worked on the science fiction television series "Doctor Who" and "Blake's 7" as well as crime dramas such as "Juliet Bravo" and "Bergerac".
 Set in the year 2027, a time where Interplanetary travel has become commonplace, it starred David Calder as Nathan Spring, commander of the International Space Police Force—nicknamed the “Star Cops"—who provide law enforcement for the newly developing colonies of the Solar System.
 The series follows Nathan Spring and the rest of his multinational team as they work to establish the Star Cops and solve whatever crimes come their way.
 Operating in a relatively accurately realised hard SF, near-future, space environment, many of the cases that the Star Cops investigate arise from opportunities for new crimes presented by the technologically advanced future society the series depicts and from the hostile frontier nature of the environment that the Star Cops live in.
Sam Youd (16 April 1922 – 3 February 2012), known professionally as Christopher Samuel Youd, was a British writer, best known for science fiction under the pseudonym John Christopher, including the novels "The Death of Grass", "The Possessors", and the young-adult novel series "The Tripods".
 He won the Guardian Prize in 1971 and the Deutscher Jugendliteraturpreis in 1976.
Foundation: The International Review of Science Fiction is a critical peer-reviewed literary magazine established in 1972 that publishes articles and reviews about science fiction.
 It is published triannually (spring, summer, and winter) by the Science Fiction Foundation.
 "Worlds Without End" called it "the essential critical review of science fiction", whilst "The Encyclopedia of Science Fiction" has called it "perhaps the liveliest and indeed the most critical of the big three critical journals" (the others being Extrapolation (journal) and Science Fiction Studies).
 A long-running feature was the series of interviews and autobiographical pieces with leading writers, entitled "The Profession of Science Fiction", a selection of which was edited and published by Macmillan Publishers in 1992.
 Several issues have been themed, including #93 ("A Celebration of British Science Fiction", 2005), published also as part of the Foundation Studies in Science Fiction.
 The hundredth edition (Summer 2007) was unusual in that it was an all-fiction issue, including stories by such writers as Vandana Singh, Tricia Sullivan, Karen Traviss, Jon Courtenay Grimwood, John Kessel, Nalo Hopkinson, Greg Egan, and Una McCormack.
 Back issues of the journal are archived at the University of Liverpool's SF Hub whilst more recent issues can be found electronically via the database providers ProQuest.
"The Time of Angels" is the fourth episode in the fifth series of British science fiction television series "Doctor Who", first broadcast on 24 April 2010 on BBC One.
 It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was "Flesh and Stone".
 Moffat utilised the two-part episode to bring back a couple of his previous creations: the Weeping Angels from his series three episode "Blink", and River Song (Alex Kingston) from the series four episodes "Silence in the Library" and "Forest of the Dead".
 The episode is partly set in the 51st century.
"The Unicorn and the Wasp" is the seventh episode of the fourth series of the revived British science fiction television series "Doctor Who", which was aired by BBC One on 17 May 2008 at 19:00.
 Perhaps due to its later broadcast, it received an overnight audience rating of 7.7 million, making it the most successful episode in this series since "The Fires of Pompeii".
 The episode is a pseudohistorical story set in 1926, in a manor owned by a character named Lady Eddison, which crime fiction novelist Agatha Christie is visiting, and is a comedic episode with a murder-mystery storyline.
The Torchwood Archive is a Big Finish Productions audio drama celebrating the 10th Anniversary of the British science fiction television series "Torchwood", a spin-off of the long-running British science fiction television series "Doctor Who".
 The story was written by James Goss and stars the majority of the original television cast including John Barrowman, Eve Myles and Gareth David-Lloyd as Captain Jack Harkness, Gwen Cooper and Ianto Jones, respectively.
"Blink" is the tenth episode of the third series of the British science fiction television series "Doctor Who".
 It was first broadcast on 9 June 2007 on the British Broadcasting Corporation (BBC).
 The episode was directed by Hettie MacDonald and is the only episode in the 2007 series written by Steven Moffat.
 The episode is based on a previous short story written by Moffat for the 2006 "Doctor Who Annual", entitled "'What I Did on My Christmas Holidays' By Sally Sparrow".
Cottrell-Boyce has won two major British awards for children's books, the 2004 Carnegie Medal for "Millions", which originated as a film script, and the 2012 Guardian Prize for "The Unforgotten Coat", which was commissioned by a charity.
"Smile" is the second episode of the tenth series of the British science fiction television series "Doctor Who".
 It is written by Frank Cottrell-Boyce and was broadcast on 22 April 2017 on BBC One.
 "Smile" received generally positive reviews from critics, with critics commenting on the Doctor and Bill's growing relationship.