John McCarthy
Eugene Patrick John McCarthy OBE
British choral conductor, scholar, composer and arranger, 1919 - 2009, founder in 1951 of the [a39874], which in the 1960s, when he was chorus master of the London Symphony Orchestra, became the London Symphony Orchestra Chorus.
http://www.theguardian.com/music/2009/jul/16/obituary-john-mccarthy