The Choir: Sing While You Work, BBC Two David was asked by Gareth Malone to take rehearsals for the Bristol Royal Mail postal workers choir featured on the episode of Gareth Malone’s new series on Thursday 27 September. David worked with the singers who were selected for choir especially for the programme, teaching them a number of songs featured on the programme and working on their choral technique http://www.bbc.co.uk/i/b01n2xgz/?t=19m12s