Question: What English composer/musician, known as the "Fifth Beatle," produced two records by British vocal group, The Master Singers?  

Context paragraphs:
Jules Knight: Julian "Jules" Knight (né Kaye; born 22 September 1981) is an English actor and singer.  He is best known for being a member of the British vocal group Blake and his portrayal of Harry Tressler in the medical drama "Holby City".  He left Blake in January 2013 and first appeared in "Holby City" as doctor Harry Tressler on 14 May 2013.  Knight left "Holby City" on 14 April 2015.

Can't Stop the Love (song): "Can't Stop the Love" is a song by British vocal group Neon Jungle featuring Australian-American rapper Snob Scrilla.  It is Neon Jungle's fifth and final single from their debut album, "Welcome to the Jungle" (2014), and was released in the United Kingdom on 15 December 2014.

Mirabilis (album): Mirabilis is the fifth album by British vocal group Mediæval Bæbes.

The Master Singers: The Master Singers were a British vocal group in the 1960s.  Comprising four schoolmasters, they specialised in comedic recordings of mundane documents and announcements such as the radio weather forecast and "Highway Code", performed "a cappella" as Anglican chant.  Two of their records, "Highway Code" and "Weather Forecast", both produced by George Martin, reached the UK singles chart in 1966.

Fifth Beatle: The fifth Beatle is an informal title that various commentators in the press and entertainment industry have applied to people who were at one point a member of the Beatles, or who had a strong association with the "Fab Four" (John Lennon, Paul McCartney, George Harrison, and Ringo Starr) during the group's existence.  The "fifth Beatle" claims first appeared in the press immediately upon the band's rise to global fame in 1963–64.  The members have offered their own beliefs of the "fifth Beatle":

Cyrus Faryar: Cyrus Faryar (born February 26, 1936) is an American folk musician, songwriter, and record producer.  He was active in musical, theatrical, and performance events in high school.  After graduating from high school and attending college, he became involved in the entertainment industry, opening the first coffee house in Hawaii.  He later moved to Southern California and became active with several groups.  When Dave Guard left the Kingston Trio to pursue his interest in early folk music styles, Guard asked Faryar to join his new group, The Whiskeyhill Singers.  After the Whiskeyhill Singers disbanded Faryar moved to San Diego to perform with other folk musicians.  After his San Diego period Faryar returned to Hawaii, where he helped form the Modern Folk Quartet, and produced two records of his eclectic neo-folk music style.   Still living in Hawaii, he continues to perform occasionally with his recognizable and distinctive deep baritone voice.

Barry Johnston (writer): Charles Barry Johnston (born on 17 April 1949 in Paddington, London, England), also known as Barry Alexander, is a British writer, audiobook producer, radio presenter and songwriter.  He is the eldest son of the BBC cricket commentator Brian Johnston (24 June 1912 – 5 January 1994).  He was a member of the British vocal group Design in the 1970s and later presented radio shows on KLOA-AM in California, US and on BBC Radio in the UK.  He is now an award-winning producer of audiobooks and has also edited and written several books, including biographies of Kenneth Horne and of his father, Brian Johnston.

George Martin: Sir George Henry Martin {'1': ", '2': ", '3': ", '4': "} (3 January 19268 March 2016) was an English record producer, arranger, composer, conductor, audio engineer, and musician.  He was referred to as the "Fifth Beatle", including by Paul McCartney, in reference to his extensive involvement on each of the Beatles' original albums.  Martin produced 30 number-one hit singles in the United Kingdom and 23 number-one hits in the United States.

Our Kid: Our Kid was a British vocal group that was first discovered on the ITV show, "New Faces", winning the programme on 1 May 1976.  They then had a number two hit single in the UK Singles Chart in 1976 with "You Just Might See Me Cry", which peaked on 3 July 1976.  The track was released on the Polydor label, and spent eleven weeks in the chart.  Further singles "I Can't Live Without You" and "Romeo and Juliet" were not successful.

The Stargazers (1940s–1950s group): The Stargazers were a British vocal group, jointly founded in 1949 by Cliff Adams and Ronnie Milne.  Other original members were Marie Benson, Fred Datchler and Dick James.  Very shortly after the group made their first broadcasts with BBC Radio on such programs as "Workers' Playtime", Dick James decided to resume his career as a solo vocalist, left the group, and was replaced by Bob Brown.  Ronnie Milne took care of the musical arranging, while Cliff Adams became its manager, in addition to contributing scores for the group.  In September 1953, Milne left the Stargazers to emigrate to Canada, and was replaced in the group by Dave Cary.  The group served as backing vocalists for Petula Clark on her first recordings.

Supporting paragraphs: The Master Singers George Martin
Answer: George Martin