Question: What English musician and DJ wrote Littlest Things?

full_context: Document 1: Alright, Still: Alright, Still is the debut studio album by English singer and songwriter Lily Allen, released on 13 July 2006 by Regal Recordings. After being rejected by several labels, Allen signed to London Records, who eventually lost interest in Allen, leading her to meet production duo Future Cut and sign to Regal Recordings. Recording for the album began in 2004 with sessions between Allen and Future Cut, and Allen's work garnered publicity on the Internet as she posted demos to her Myspace account before they were officially released. Allen later travelled to the United States to work with Greg Kurstin and Mark Ronson, to complete the final half of the album in 2006.
Document 2: Alfie (Lily Allen song): "Alfie" is a song by British recording artist Lily Allen from her debut studio album, "Alright, Still" (2006). Written by Allen and Greg Kurstin, the song was released as the fourth and final single from the album, on 5 March 2007, by Regal Recordings. In the United Kingdom, it was marketed as a double A-side single, along with "Shame for You". While the melody incorporates a sample of Sandie Shaw's "Puppet on a String", the lyrics directly describe Allen's real life younger brother, actor Alfie Allen, criticising him for his lazy behaviour.
Document 3: Mark Rankin (record engineer): Mark Rankin is a Grammy-winning British record and mixing engineer and music producer, who began his career in 2004 as a house engineer at The Exchange studios. He is a frequent collaborator of music producer Paul Epworth. Rankin's credits include critically acclaimed albums by Adele, Queens of the Stone Age, Foster the People, Florence and the Machine and Bloc Party.
Document 4: Littlest Things: "Littlest Things" is a song by British recording artist Lily Allen from her debut studio album, "Alright, Still". Written by Allen, Mark Ronson and Santi White, the song was released as the third single of the album on 11 December 2006 by Regal Recordings. It incorporates a piano sample from Pierre Bachelet and Herve Roy's music from "Emmanuelle", for which they were credited as co-writers, as the lyrics tackle the singer dealing with the departure of her boyfriend, while reminiscing about their time together. The song was created in a New York studio, after Allen had met Ronson, who was impressed by her previous work and offered her different samples.
Document 5: Every Little Thing (Beatles song): "Every Little Thing" is a song by the English rock group the Beatles from their 1964 album "Beatles for Sale". Credited to Lennon–McCartney, it was written by Paul McCartney, although John Lennon is the more prominent lead vocalist on the recording. Rather than include the track on the North American version of "Beatles for Sale" (which was titled "Beatles '65"), Capitol Records first issued the song on the June 1965 release "Beatles VI". The track is an early example of the Beatles' use of non-rock instrumentation on a recording, through the addition of timpani drum over the choruses.
Document 6: Here Comes the Fuzz: Here Comes the Fuzz is the debut studio album by British producer Mark Ronson. The album was released on 8 September 2003, led by the lead single, "Ooh Wee". Unlike Ronson's later releases, his debut album focuses more on the genre of hip-hop, with guest appearances from a number of famous rappers and hip-hop alumni, including Ghostface Killah, M.O.P., Nate Dogg, Saigon and Sean Paul. The album also features appearances from singers Rivers Cuomo and Daniel Merriweather, whose commercial breakthrough came with this album.
Document 7: Record Collection (album): Record Collection is the third studio album by music producer Mark Ronson. The album was released under the moniker Mark Ronson & The Business Intl. and was released on 27 September 2010 in the UK and on 28 September 2010 in the US.
Document 8: The Bike Song: "The Bike Song" is the second single taken from "Record Collection", the third studio album by Mark Ronson, released under the moniker Mark Ronson & The Business Intl. The song features singer Kyle Falconer from Scottish indie rock band The View and rapper Spank Rock. It was released on 17 September 2010 in the UK.
Document 9: Version (album): Version is the second album by New York-based English producer Mark Ronson. It is an album of cover versions with a retro-inspired sound, which Mark Ronson describes as "Motown/Stax". "Version" was released on 14 June 2007 in the iTunes Store, and it entered the UK Album Chart at number two on 22 June 2007.
Document 10: Lily Allen discography: English singer and songwriter Lily Allen has released three studio albums, two extended plays, 20 singles (including six as a featured artist), two promotional singles and 21 music videos. Allen's range of musical genres incorporates styles such as pop, ska, electropop and reggae fusion. She became well-known through her Myspace account, on which she started posting demo songs in 2005. The increase of popularity led to a contract with Regal Recordings. Her debut single, "Smile", was released in 2006 and topped the UK Singles Chart for two weeks. Allen's first studio album, "Alright, Still" (2006), was released shortly after. The album was commercially successful, earning a three times platinum certification in the United Kingdom, and gold in the United States. The album was nominated for Best Alternative Music Album at the 50th Grammy Awards. Follow-up singles "LDN", "Littlest Things" and "Alfie" did not repeat her early success, although they still sold well; "LDN" peaked at number six on the UK Singles Chart.
Document 11: Lily Allen: Lily Rose Beatrice Cooper (née Allen; born 2 May 1985), known professionally as Lily Allen, is an English singer, songwriter, actress, and television presenter. She is the daughter of actor Keith Allen and film producer Alison Owen. Allen left school when she was 15 and concentrated on improving her performing and compositional skills. In 2005, she made some of her recordings public on Myspace and the publicity resulted in airplay on BBC Radio 1 and a contract with Regal Recordings.
Document 12: Mark Ronson: Mark Daniel Ronson (born 4 September 1975) is an English musician, DJ, singer, songwriter and record producer. Although his debut album "Here Comes the Fuzz" failed to make an impact on the charts, his second album "Version" reached number two in the UK and included three top 10 singles. This earned him a Brit Award for Best British Male Solo Artist in 2008. His third studio album, "Record Collection", was released on 27 September 2010, peaking at number two in the UK.
Document 13: Smile (Lily Allen song): "Smile" is the debut single by British recording artist Lily Allen from her debut studio album "Alright, Still" (2006). It was written by Allen, Iyiola Babalola and Darren Lewis, while sampling The Soul Brothers' "Free Soul". The song was released as the lead mainstream single of the album in July 2006. After signing a contract deal with Regal Recordings and gaining popularity on the social network website Myspace with demo songs, Allen released a limited edition of "LDN" to promote her work and afterwards announced the release of "Smile".
Document 14: Bang Bang Bang (Mark Ronson song): "Bang Bang Bang" is a song from "Record Collection", the third studio album by Mark Ronson, released under the moniker Mark Ronson & The Business Intl. The song features rapper Q-Tip and singer Amanda Warner of MNDR. It was released as the album's lead single on 9 July 2010 in the United Kingdom.
Document 15: Ooh Wee (Mark Ronson song): "Ooh Wee" is a song by Mark Ronson featuring Ghostface Killah, Nate Dogg, Trife and Saigon. It was released as the lead single from Ronson's debut studio album, "Here Comes the Fuzz", on 20 October 2003. It charted at number 15 on the UK Singles Chart, and caused Ronson to return to the UK after many years of living in the United States.
ground_truth: Mark Ronson