The BBC Concert Orchestra is a British concert orchestra based in London, one of the British Broadcasting Corporation's five radio orchestras. With around fifty players, it is the only one of the five BBC orchestras which is not a full-scale symphony orchestra. The BBC Concert Orchestra is the BBC's most populist ensemble, playing a mixture of classical music, light music and popular numbers. Its primary role is to produce music for radio broadcast, and it is the resident orchestra of the world's longest-running live music programme, Friday Night is Music Night on BBC Radio 2.