It was a defining moment in the history of popular music. On 16 May 1966 at the Free Trade Hall Bob Dylan shrugged off his image as a solo poet-troubadour, traded four-letter words with a frantic audience, and set the place alight with a performance that is still considered one of the greatest rock 'n' roll shows ever. Joel Gilbert is the leader of Highway 61 Revisited, the world's only Bob Dylan tribute band, he said: "The Free Trade Hall is of tremendous historical significance in the history of Bob Dylan and indeed rock music. He performed there on 16 May 1966 during his transition from acoustic to electric music, something that disgruntled many of his fans. It shows in the exchange of angry words between Dylan and members of the audience - and the music that followed became the most bootlegged rock concert of all time. It is also one of the most misunderstood. For years, illicit vinyl copies mistakenly claimed that the tapes were from Dylan's London shows - but it was the Manchester concert and it was eventually released officially in 1998 as 'Live 1966'."