“I wasn’t always this introverted. I think young people should have a lot of fun. But I never seem to have any.” So said Roger Keith “Syd” Barrett in an interview with Rolling Stone in 1971. Three years on from parting with Pink Floyd – a band he co-founded and named – Barrett had just released his second and final studio album, Barrett, before withdrawing from the limelight, a visionary, plagued genius; victim of psychedelic consumption. Tales of his heavy LSD use and notoriously erratic behaviour are well documented, agonisingly revealing the birth and decay of arguably psychedelia’s brightest star, a beatific songsmith, equally entrenched and liberated by his…