Connolly fan alerted him to possibility he had Parkinson's

Billy Connolly realised he was suffering from Parkinson's disease after a fan noticed a problem with the way he walked.

The 71-year-old star was spotted by an Australian doctor, who was on tour with a group of dancers in America, and he insisted the comedian showed a "strange gait" which led to Billy being diagnosed with the degenerative nerve disorder.