In his mission to get some of the country's busiest workplaces singing, Gareth Malone heads west to the Royal Mail in Bristol. He wants to create the second of four choirs that will compete in the contest to find his best workplace choir. As he searches for hidden talent amongst the managers and posties from across the region, the initial reaction from staff is quite mixed. But as the choir begin to bond through rehearsals, Gareth discovers an enormous sense of pride in the workforce and the song he chooses for the choir to sing hits the right note.