Mumford & Sons brought their ambitious new live show to the O2 in London on 29th November last year. Dick Carruthers, directing legend of live music, who had filmed the band during their tour of South Africa a couple of years ago - released as Blood & Thunder - came on board to chronicle the occasion, and from that has come this vibrant and emotional distillation of the evening, from soundcheck to the very end of the show.

At its core is the performance that climaxed the whole show: Delta, the title track of the new album. It begins with the band playing the first section of this slow-burning epic during the soundcheck, in an empty arena. Then it transforms into a packed O2, and we witness that remarkable connection that the band has with their audience.

With the stage in the middle of the arena, it's a radically different show for a band that have always been known for setting up in a line across a stage. Here at the O2, the crowd envelop Mumford & Sons from all sides. And Carruthers' command of his multi-camera team ensures that you get the complete scale of the occasion as well as the small treasurable details of the band's performance on stage - and the warmth between them.