Africa Express: Paul McCartney and exclusive behind-the-scenes footage part two - video

The Africa Express tour, featuring over 80 musicians including Damon Albarn and Baaba Maal, finished its epic tour of the UK by train with a gig at Granary Square in King's Cross in London. Among the special guests on the night was Sir Paul McCartney, who joined the collective to play two Wings songs – and you can watch footage here in this exclusive film