The grand final of Gareth Malone's contest to find Britain's most entertaining, undiscovered amateur choir. From the hundreds who applied, and the many groups Gareth auditioned across the country, just three are left standing. All that now stands between them and the title of series champion is one last challenge - one that comes with a twist. While the loss of their leader poses a problem for one choir, another group decamps to the country to focus all their energies on victory. The choirs have just ten days to perfect their performances before they compete one final time, in front of a 2,000-strong crowd and a jury of musical experts, at London's prestigious Central Hall Westminster. To emerge triumphant, the choirs must impress the jury, whose votes decide who will be crowned Gareth's Best in Britain.