Question: Who composed lyrics for the rock musical by Andrew Lloyd Webber that has the love duet "Only You?"
Context: Charles Hart (born 3 June 1961) is a British lyricist, songwriter and musician.  He is best known for writing the lyrics to, and contributing to the book of Andrew Lloyd Webber's stage musical "The Phantom of the Opera" and for writing the lyrics to Bend It Like Beckham the Musical.  He also co-wrote (with Don Black) the lyrics to Lloyd Webber's 1989 musical "Aspects of Love".  Hart also re-wrote Glenn Slater's lyrics for "Love Never Dies", the sequel to "Phantom". "Unexpected Song" is a 1984 song from the musical "Song & Dance" originally sung (on Broadway) by Bernadette Peters.  The music was written by Andrew Lloyd Webber, with lyrics by Don Black.  A single was released by Sarah Brightman.  Originally released by Marti Webb and Justin Hayward as a duet in 1981 the song had new lyrics penned for the original 1982 production of the show and was re-titled "When You Want to Fall in Love".  The original lyrics were re-instated when the show was re-written for Brightman's run.  It was later used in Lloyd Webber's and Black's reworking of the show, returning to the original album title of "Tell Me on a Sunday".  The single peaked at #76 on the UK Singles Chart. Love Never Dies is a romantic musical composed by Andrew Lloyd Webber with lyrics by Glenn Slater and a book by Lloyd Webber, Ben Elton, Frederick Forsyth and Slater.  It is a sequel to the long-running musical "The Phantom of the Opera" loosely adapted from the 1999 novel "The Phantom of Manhattan", by Forsyth. The Wizard of Oz is a musical based on the 1939 film "The Wizard of Oz", with a book adapted by Andrew Lloyd Webber and Jeremy Sams.  The musical uses the Harold Arlen and E. Y. Harburg songs from the film and includes some new songs and additional music by Andrew Lloyd Webber and additional lyrics by Tim Rice. "All I Ask of You" is a song performed by Cliff Richard and Sarah Brightman during the 1986 English musical "The Phantom of the Opera".  It was written by Andrew Lloyd Webber, Charles Hart and Richard Stilgoe, and produced by Lloyd Webber.  The duet was meant for characters Christine Daaé and Raoul during the stage musical.  An operatic pop piece, its lyrics serve as dialogue between the two characters and discuss themes such as commitment and romance.  During the stage performance of "All I Ask of You", Steve Barton performs as the role of Raoul instead of Richard.  Like Lloyd Webber's song "The Music of the Night", "All I Ask of You" was compared to the music found in Giacomo Puccini's 1910 opera "La fanciulla del West". Starlight Express is a rock musical by Andrew Lloyd Webber (music), Richard Stilgoe (lyrics), with later revisions by Don Black, David Yazbek, Alistair Lloyd Webber and Nick Coler.  The actors famously perform wearing roller skates, with original choreography by Arlene Phillips.  In the story, a child’s train set magically comes to life, and the various engines compete to become the "Fastest Engine in the World".  The underdog, Rusty the steam train, has little chance until he is inspired by the legend of the Starlight Express, ultimately winning both the race and the heart of first-class coach Pearl. Cats is a 1998 direct-to-video musical film of the long-running West End production of "Cats", Andrew Lloyd Webber's musical based on "Old Possum's Book of Practical Cats" by T. S. Eliot.  Lloyd Webber himself personally oversaw orchestration for the film and called on Gillian Lynne, the original show's choreographer, to personally train the cast for the film.  Trevor Nunn, the original director, did not serve as the director of this production.  Andrew Lloyd Webber and others on the production team for the film wanted to keep the feeling that viewers watching the film could still get the sense of seeing the show live, by having all views be facing the stage, therefore, getting multiple views of the set, but still feel like the viewer is part of a live audience, with several close-ups.  Initially released to VHS and subsequently DVD and Blu-ray, the film has since been shown on television channels including PBS, the BBC, and Ovation TV.  It was filmed at the Adelphi Theatre in London. Lloyd Webber Plays Lloyd Webber is a 2001 album by British cellist Julian Lloyd Webber.  For the album, the musician chose to interpret songs written by his older brother, the popular musical theatre composer Andrew Lloyd Webber.  The album was recorded with the Royal Philharmonic Orchestra.  The album primarily featured classical musicians with the notable exception of Rod Argent of The Zombies. "As If We Never Said Goodbye" is a song from the musical "Sunset Boulevard".  It is written by Don Black, Christopher Hampton (with additional lyrics by Amy Powers), and Andrew Lloyd Webber.  Ben Rimalower on Playbill calls it Andrew Lloyd Webber's greatest song. "Only You" is the love duet from Andrew Lloyd Webber's "Starlight Express".  It is performed by the protagonist, Rusty, a young steam locomotive and his true love, the observation car, Pearl.
Answer: Richard Stilgoe