Jill Paice is an American actress best known for her musical theatre roles.
 She originated the roles of Laura Fairlie in the musical "The Woman in White" in the West End (2004) and on Broadway (2005); Niki in "Curtains" on Broadway (2006); Scarlett in London's "Gone With The Wind" (2008); and Grazia Off-Broadway in "Death Takes a Holiday" (2011).
 Among other roles, she appeared in the Broadway play "The 39 Steps" (2009).
Oliver Mason is a British actor and voiceover artist.
 He began acting with The Guildhall School of Music and Drama aged six in his hometown of Norwich.
 He trained at the National Youth Theatre, Middlesex University, the University of South Florida, and the Webber Douglas Academy of Dramatic Art in London.
 Oliver has had leading roles in BBC's 'The Mysti Show', The West End production of 'The Bomb-itty of Errors' and the American Feature 'The 7 Adventures of Sinbad'.
 Other work includes roles in EastEnders and 'From Bard to Verse' on BBC and Twelfth Night and A Midsummer Night's Dream in London's West End.
Lee Stephen Mead (born 14 July 1981) is an English musical theatre and television actor, best known for winning the title role in the 2007 West End revival of "Joseph and the Amazing Technicolor Dreamcoat" through the BBC TV casting show "Any Dream Will Do".
 As well as subsequent West End roles in "Wicked, " and The West End Men, Mead has pursued a music career, releasing three solo albums and undertaking concert tours in the UK and Japan.
Katie Rowley Jones (born c. 1978) is a British musical theatre actress best known for her portrayal of Nessarose in the West End production of "Wicked" and Sister Mary Robert in the West End production of "Sister Act".
The Gaiety Theatre was a West End theatre in London, located on Aldwych at the eastern end of the Strand.
 The theatre was first established as the Strand Musick Hall (sic) in 1864 on the former site of the Lyceum Theatre.
 In 1868, it became known as the Gaiety Theatre and was, at first, known for music hall and then for musical burlesque, pantomime and operetta performances.
 From 1868 to the 1890s, it had a major influence on the development of modern musical comedy.
The Music Hall Guild of Great Britain and America and the Theatre and Film Guild of Great Britain and America is a registered theatre charity and non-profit making theatre organisation based in London.
 The Guild's patrons include Brian Croucher, Anita Dobson, Fenella Fielding, Sheila Ferguson, Jessica Martin, Lorraine Chase, Gillian Gregory, Mark Lester, Jessie Wallace, Barbara Windsor and Shani Wallis.
The Metropolitan Theatre was a West End music hall and theatre located at 267 Edgware Road, Paddington, London.
 The original building on this site, the "White Lion Inn" dated from 1524.
 In 1836, this was rebuilt to become "Turnham's Grand Concert Hall".
 In 1862 rebuilding commenced again, at a cost of £25,000, ending in 1864 with an increased capacity of 2000 and a new name of "The Metropolitan Music Hall".
 It was redesigned in 1896 by the theatre architect Frank Matcham with a new and enlarged stage, new dressing rooms and a new auditorium seating 1,855; it opened in 1897 as "The Metropolitan Theatre".
 The theatre eventually became a television studio and was in use until it was demolished in 1964.
The Alhambra was a popular theatre and music hall located on the east side of Leicester Square, in the West End of London.
 It was built originally as the Royal Panopticon of Science and Arts opening on 18 March 1854.
 It was closed after two years and reopened as the Alhambra.
 The building was demolished in 1936.
 The name was also adopted by many other British music hall theatres located elsewhere; in Bradford, in Hull and in Glasgow etc.
 The name comes from association with the Moorish splendour of the Alhambra palace in Granada, Spain.
Shani Wallis (born 16 April 1933) is an English-born American actress and singer of theatre, television and film, in both her native United Kingdom and in the United States.
 She is perhaps best known for her roles in the West End, and for the role of Nancy in the 1968 Oscar-winning film musical "Oliver!
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Billy Boyle is an Irish actor on British film, television and stage.
 He is a veteran of the West End stage having played leading roles in over 15 hit shows.
 In his first West End musical "Maggie May" he was nominated as best newcomer.
 Gower Champion then chose him to play Barnaby in "Hello Dolly" at The Theatre Royal Drury Lane.
 He appeared in "Canterbury Tales" at the Phoenix Theatre as The Clerk of Oxford.
 Harold Hobson, The Times critic said, "He was a breath of fresh air in the West-End".
 He then went on to play leading roles in "No Sex Please, We're British", "Billy", "What's a Nice Country", "The Rivals", "Love, Lust, & Marriage", "Some Like it Hot", Disney's "Beauty and the Beast", and in the original cast of "Dirty Dancing.
 Lately he has appeared as Grandpa George" and Grandpa Joe in Charlie and The Chocolate Factory at Drury Lane.
 In 2016 he was Major Bouvier and Norman Vincent Peale in the smash hit Grey Gardens.
 He followed this playing Arvide in Guys and Dolls at the Phoenix Theatre in the West End.He has had his own very successful television series in Ireland "It's Billy Boyle" as well as leading roles in "Trail of Guilt", the award-winning "The Grass Arena", "The Bretts", as well as many guest appearances in EastEnders, The Professionals, Coronation Street, Father Ted etc.
 In the late 1970s, Boyle was cast as 'Ronald McDonald' in the European TV commercials and in all print media for the fast food chain McDonald's.
 He was the last 'straight man' to Basil Brush on BBC1's "The Basil Brush Show" and later presented a programme, Dance Crazy for ITV, on the history of dance with Lesley Judd.
 Lately he has been seen in Dirk Gently, for BBC Four and Lead Balloon.
 His many films include Stanley Kubrick's "Barry Lyndon", "Groupie Girl", "Side by Side", "Shergar", "Wild Geese II", "The Scarlet and the Black", "Round Ireland with a Fridge" and A United Kingdom.

Question: The actress best known for her roles in the West End and Oliver frequented a Music Hall registered for what?
Answer: registered theatre charity and non-profit