Question: Which theatre producer is associated with many of Andrew Lloyd Webber's productions, including "The Phantom of the Opera"?
Context: 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. Sir Cameron Anthony Mackintosh (born 17 October 1946) is a British theatrical producer notable for his association with many commercially successful musicals.  At the height of his success in 1990, he was described as being "the most successful, influential and powerful theatrical producer in the world" by the "New York Times".  He is the producer of shows such as "Les Misérables", "The Phantom of the Opera", "Mary Poppins", "Oliver! ", "Miss Saigon" and "Cats. Gina Beck (born 30 December 1981) is a British actress and singer known primarily for playing major roles in leading West End theatre productions.  She is best known for playing the role of Magnolia Hawks in Daniel Evans' acclaimed production of "Show Boat", Glinda the Good Witch in "Wicked", both in the UK production and the US tour, Christine Daaé in Cameron Mackintosh's production of Andrew Lloyd Webber's "The Phantom of the Opera" and Cosette in "Les Miserables". Linda Balgord is an award winning American Broadway actress and singer, most notable for playing Norma Desmond in the 1996 United States tour of Andrew Lloyd Webber's hit musical "Sunset Boulevard", being the last actress to portray Grizabella in the original Broadway run of "Cats" and originating the role of Queen Elizabeth I in "The Pirate Queen" on Broadway.  She has also played the role of Madame Giry in Andrew Lloyd Webber's "The Phantom of the Opera", previously in the restaged North American tour, and currently on Broadway. Anna O'Byrne is an Australian actress and soprano singer best known for her portrayal of Christine Daaé in Andrew Lloyd Webber's "The Phantom of the Opera" and the original Australian production of Lloyd Webber's sequel, "Love Never Dies", for which she was nominated for a Green Room Award.  O'Byrne has also portrayed Maria in "West Side Story", as well as Sister Sarah Brown in "Guys and Dolls".  From 2016, O'Byrne has played Eliza Doolittle in the Julie Andrews directed production of "My Fair Lady" for Opera Australia at the Sydney Opera House, touring in 2017 to Brisbane, Melbourne and back to Sydney.  She is currently based in London and performs internationally.  Her performance career includes opera, theatre, concert, and film. 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. The Phantom of the Opera is a musical with music by Andrew Lloyd Webber and lyrics by Charles Hart and Richard Stilgoe.  Lloyd Webber and Stilgoe also wrote the musical's book together.  Based on the French novel "Le Fantôme de l'Opéra" by Gaston Leroux, its central plot revolves around a beautiful soprano, Christine Daaé, who becomes the obsession of a mysterious, disfigured musical genius living in the subterranean labyrinth beneath the Opera Garnier. "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". 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. 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".
Answer: Cameron Mackintosh