Choirmaster Gareth Malone returns to create harmony in five of Britain's biggest workplaces. As the contest to be crowned 'best workplace choir' continues, Gareth checks out the talent at supermarket giant, Sainsbury's.

When the choir's deepest bass breaks cover with his passion for Dolly Parton will the head office high flyers and the shop and depot workers finally sing with one voice, united by the Queen of country? Show less