English National Opera (ENO) is a British 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. ENO's productions are sung in English.

The London Coliseum is a theatre in St Martin's Lane, Westminster, built as one of London's largest and most luxurious "family" variety theatres. Opened on 24 December 1904 as the London Coliseum Theatre of Varieties, it was designed by the architect Frank Matcham for the impresario Oswald Stoll. Their ambition was to build the largest and finest music hall, described as the "people's palace of entertainment" of its age.