In 1976 the work of the BBC 's professional choir , the BBC Singers , increased .
John Poole gave up his work with the BBC Choral Society in order to concentrate on the BBC Singers ' activities .
In 1976 the work of the BBC 's professional choir , the BBC Singers , increased and John Poole gave up his work with the BBC Choral Society in order to concentrate on the BBC Singers ' activities .