 The concert was held and recorded at the London Palladium on September 21, 1975.An IRA bomb threat warning was given as June Carter Cash started to sing "The Church in the Wildwood" meant the theatre had to be evacuated but the show continued after the building was searched.The bomb threat announcement and the subsequent evacuation order is included on the recording and is, in fact, a "hidden" track and is not listed on the record sleeve or CD cover.