Choirmaster, Gareth Malone, creates harmony in five of Britain's biggest workplaces for a second and even more musically challenging series of The Choir: Sing While You Work. As the contest to be crowned "best workplace choir" begins, the novice choirs from P&O, Birmingham City Council, Sainsbury's, Cheshire Fire & Rescue Service and Citi, the bank tackle the giants of the choral tradition and face a brand new line-up of world class judges.