Question: This Scottish singer has placed 15 albums in the UK Albums Chart from 1977 to date and sang what great hit as a duet with Elaine Paige?

Context articles: Elaine Paige and Friends
Elaine Paige Live
Essential Musicals
Barbara Dickson
Del Amitri discography
Elaine Paige on Sunday
Elaine Paige in Concert
Gabrielle Aplin discography
I Know Him So Well
Encore (Elaine Paige album)

Elaine Paige and Friends is a duet album from Elaine Paige, released on November 1, 2010.
 Phil Ramone produced the album for Rhino/Warner Bros Records.
 The CD debuted on the UK Singles Chart at #18.
 Paige toured the UK in concert in support of the recording in the beginning of 2011.
 The CD sold "more than 100,000 units and earned Gold certification from the BPI", as of December 20, 2010.
Elaine Paige Live is a live solo album by Elaine Paige, recorded and released in 2009 during an early date of Paige's 40th anniversary concert tour.
Essential Musicals is an album by Elaine Paige, released in 2006.
 The album was produced by Mike Moran, vocals were recorded at Air-Edel Studios in London, and the orchestra backing recorded at The Hungarian State Radio Studios, Budapest.
 The album peaked at #46 in the UK Albums Chart.
Barbara Ruth Dickson, OBE (born Dunfermline, Fife, 27 September 1947) is a Scottish singer whose hits include "I Know Him So Well", "Answer Me" and "January February".
 Dickson has placed fifteen albums in the UK Albums Chart from 1977 to date, and had a number of hit singles, including four which reached the Top 20 in the UK Singles Chart. "
The Scotsman" newspaper has described her as Scotland's best-selling female singer in terms of the numbers of hit chart singles and albums she has achieved in the UK since 1976.
The discography of Del Amitri, a Scottish pop rock band formed in 1983, includes six studio albums, one live album, two compilation and 19 singles.
 Four of their studio albums reached the top 10 in the UK Albums Chart.
 Their first album, which is a self-title album released in May 1985 did not enter the UK Albums Chart at all, and their final studio album "Can You Do Me Good?
", released in 2002, peaked at number 13.
 The band's most successful studio album was their third "Change Everything", which reached second place in the UK Albums Chart.
 Also the band's compilation album, "Hatful of Rain: The Best of Del Amitri", got to fifth place in the UK Albums Chart.
 The band broke up in 2002.
 They played a reunion gig at The Hydro Glasgow on 24 January 2014.
 A live album, "Into the Mirror", recorded on the reunion tour in January and February 2014 was released on 20 October 2014.
Elaine Paige on Sunday (often referred to on air as EPOS) is a British radio programme broadcast on BBC Radio 2, that is hosted by the actress and singer Elaine Paige.
 The show launched on 5 September 2004 and features music from stage and screen productions and interviews from celebrity guests.
 As of 2012, The producer of "Elaine Paige on Sunday" is Jessica Rickson.
Elaine Paige in Concert was a video recording of a concert performance at Birmingham Symphony Hall, which was part of Elaine Paige's 1991 UK tour.
The discography of British singer-songwriter Gabrielle Aplin, consists of two studio albums, four extended plays, three live albums and five singles.
 Her first release was the 5-track "Acoustic EP" which was released on the iTunes Store on 13 September 2010.
 Her second EP "Never Fade" was released on 9 May 2011 and saw Aplin expand her sound, showcasing a more folk rock sound and playing all instruments herself.
 In April 2011, Aplin was invited to perform for "BBC Introducing" at Maida Vale Studios, where she played 3 tracks from "Never Fade" and a cover of the Coldplay song "Fix You".
 Aplin released her third EP, "Home", on 9 January 2012.
 On 29 February 2012, Aplin announced that she had signed to Parlophone.
 Aplin was confirmed as the soundtrack to the John Lewis 2012 Christmas television advertisement, covering Frankie Goes to Hollywood's "The Power of Love", the song reached number one on the UK Singles Chart.
 On 12 December 2012, Aplin announced that the title of her debut album would be "English Rain".
 In addition, she also unveiled its artwork and release date of 29 April 2013.
 However, the album's release date was later confirmed as 13 May 2013.
 Aplin announced live on 17 February Radio 1 Chart Show that her third single would be "Panic Cord".
 The song originally featured on her Never Fade EP and it was released on 5 May 2013, charting at number 19 on the UK Singles Chart.
 "English Rain" charted at number 2 on both the UK Albums Chart and Scottish Albums Chart, while reaching number on the Irish Albums Chart.
 In 2014, Aplin released her "English Rain EP" in the United States.
 The EP was released on the 6th of May and features 5 songs from her debut album, as well as a cover of Canadian singer Joni Mitchell's "A Case of You".
 In 2015, Aplin released her second studio album entitled "Light Up the Dark".
 "Light Up the Dark" debuted at number 14 on the UK Albums Chart.
"I Know Him So Well" is a duet from the concept album and subsequent musical "Chess" by Tim Rice, Benny Andersson and Björn Ulvaeus.
 It was originally sung by Elaine Paige (as Florence) and Barbara Dickson (as Svetlana).
 In this duet, two women – Svetlana, the Russian chess champion's estranged wife, and Florence, his mistress – express their bittersweet feelings for him and at seeing their relationships fall apart.
Encore is the title of a solo album released in 1995 by Elaine Paige.
 The album peaked at number 20 on the UK Albums Chart in July 1995.