Through its incarnations as the Orchestra of St Paul's and then the Covent Garden Sinfonia, this ensemble has developed a varied repertory that includes mainstream orchestral work, contemporary minimalist music, and film scores, which it often performs live at film showings. It is adaptable in size from a small ensemble to a full symphony orchestra with 70 players.

The Orchestra of St Paul's was founded in 2007 by conductor and composer Ben Palmer, who wanted a free hand to develop programming that he felt was neglected by other British chamber orchestras. The group remains headquartered at Actors' Church, St. Paul's, in Covent Garden, London. It steadily developed an unusual repertory and has attracted major London bookings at the Royal Festival Hall at Southbank Centre, Queen Elizabeth Hall, Cadogan Hall, and more, gaining the patronage of veteran conductor Sir Roger Norrington. The orchestra's largest audiences may have come from its performances of film music: the group has performed live for showings of E.T.: The Extra-Terrestrial, Casablanca, and Psycho, and has also premiered new scores by Neil Brand for Alfred Hitchcock's silent film The Lodger and for a silent version of Oliver Twist. In 2017 the Orchestra of St Paul's changed its name to the Covent Garden Sinfonia. ~ James Manheim, Rovi