The BBC National Orchestra of Wales (BBC NOW) (Cerddorfa Genedlaethol Gymreig y BBC) is a Welsh symphony orchestra and one of the BBC's five professional radio orchestras. The BBC NOW is the only professional symphony orchestra organisation in Wales, occupying a dual role as both a broadcasting orchestra and national orchestra. The BBC NOW has its administrative base in Cardiff, at the BBC Hoddinott Hall on the site of the Wales Millennium Centre, since January 2009.
The BBC NOW is the orchestra-in-residence at St David's Hall, Cardiff, and also performs regularly throughout Wales and beyond, including international tours and annual appearances at the Royal Albert Hall in London at the BBC Proms. Broadcasting work includes studio sessions for BBC Radio and television, although the orchestra's concerts form the bulk of its broadcasts, transmitted primarily on BBC Radio 3 but also on BBC Radio Wales, BBC Radio Cymru and BBC Television. The orchestra records many soundtracks for BBC television, including Doctor Who, Torchwood, Human Planet, and Earthflight.
The precursor ensemble of the BBC NOW was the Cardiff Station Orchestra, which was founded in 1924 and had developed into the National Orchestra of Wales by 1928. Funding problems resulted in the disbandment of this orchestra in 1931. In 1935, the BBC Welsh Orchestra was established as a 20-member ensemble, but the orchestra was dissolved with the advent of the Second World War in 1939. After the war, the BBC Welsh Orchestra was revived as a 31-member ensemble, with Mansel Thomas as its first principal conductor. In 1947, the BBC Welsh Chorus was founded as the affiliate chorus of the orchestra. The orchestra's ensemble size increased steadily, reaching 44 musicians in the 1960–1961 season, 60 musicians in 1974, and 66 musicians in 1976, when the orchestra's name was changed to the BBC Welsh Symphony Orchestra. It reached a full symphonic complement of 88 players in 1987 before being reduced to its current level of 78 players in 2014 as part of BBC savings delivered by Director at the time, Michael Garvey, who also made reductions to the administrative and management team through redundancies.