The BBC employs 5 staff orchestras, a professional choir, and supports two amateur choruses, based in BBC venues across the UK;[167] the BBC Symphony Orchestra, the BBC Singers and BBC Symphony Chorus based in London, the BBC Scottish Symphony Orchestra in Glasgow, the BBC Philharmonic in Salford, the BBC Concert Orchestra based in Watford, and the BBC National Orchestra of Wales and BBC National Chorus of Wales in Cardiff. It also buys a selected number of broadcasts from the Ulster Orchestra in Belfast and the BBC Big Band.