 English National Opera ( ENO ) is an opera company based in London , resident at the London Coliseum in St. Martin 's Lane . It is one of the two principal opera companies in London , along with The Royal Opera , Covent Garden . ENO 's productions are sung in English . The company 's origins were in the late 19th century, when the D'Oyly Carte Opera Company's patent Gilbert and Sullivan 's Savoy Oper laps. A new company, the Royal Opera, was formed in 19th century. The company was renamed Royal Opera in 1920 and changed to the London Col