Collegium Musicum of London Chamber Choir - with a regular membership of about 30 singers - is a chamber choir based in Clerkenwell, London. Focusing naturally on a capella repertoire, the choir also collaborates with some of the leading professional soloists and instrumentalists in the country. The choir's repertoire encompasses sacred music of the Renaissance and Baroque periods as well as music of the nineteenth century and the great secular works of the last 100 years. Collegium Musicum of London Chamber Choir was formed in 1972 by László Heltáy. He built an excellent reputation for the choir both in Britain and abroad, was its director until 1989, and retains his involvement as its President. With a regular pool of around 30 singers, the choir has a broad repertoire, having performed masses by Bach, Haydn, Mozart and Rossini as well as works by both early and contemporary composers. The choir performs both unaccompanied choral work and collaborates with some of the country's leading professional instrumentalists and soloists. Subscription costs are kept down by performing three services per year at the choir's home, The Church of Our Most Holy Redeemer, plus various other paid performances, usually around Christmas time. The choir has a policy of attracting younger singers by offering highly favourable subscription rates for those under 25. choir for hire CML has been based at The Church of Our Most Holy Redeemer in Exmouth Market, Clerkenwell, since 1997, though the ensemble has sung in a variety of venues from small parish churches to the Barbican, St James's, Piccadilly and St John’s Smith Square. It has appeared in a number of English festivals and, in 1990, gave a series of concerts of English music in Denmark. In July 1999, Collegium Musicum took part in the world première of Jonathan Dove's opera Tobias and the Angel in the Almeida Festival, and in 2000 the choir gave the first London performance in over 200 years of Benjamin Cooke’s A Christmas Ode. Works performed since 1998 have included Sir PeterMaxwell Davies’s Solstice of Light, music from The Fayrfax Manuscript, Monteverdi's 1610 Vespers, Rossini’s Petite Messe Solennelle, Handel’s Dixit Dominus, Britten’s Saint Nicolas, Mozart’s C minor Mass, Handel's Messiah, Vaughan Williams’s Flos Campi, Stravinsky's Mass, Purcell's King Arthur, Pizzetti's Requiem, Bach’s Magnificat, Orff’s Carmina Burana, as well as music by Bartók, Billings, Brahms, Bruckner, Byrd, Charpentier, Debussy, Dove, Dunstable, Dvořák, the Gabrielis, Gesualdo, Haydn, Holst, Howells, Ives, Mahler, Mendelssohn, Respighi, Scarlatti, Tallis, Vaughan Williams and Vivaldi. Collegium Musicum aims to present four full concert programmes per year, with at least seven rehearsals in the weeks preceeding each concert, as well as Christmas choral events. Since July 2012, the choir has been led by Greg Morris.