The former Allman Brothers pianist and honorary Rolling Stone talks to Kevin E G Perry about inadvertently giving ‘Top Gear’ its theme tune, celebrating 40 years with the world’s greatest rock’n’roll band, and the ‘big loss’ of Charlie Watts

Concluding our series of first-hand accounts of life in tents, Patrick Smith recalls the way that festivals such as End of the Road and Primavera have helped him through bad times, from heartbreak to grief to crushing depression