Short answers, pulled from the story.
It was a 1960 concert tour of Scotland in which the Beatles backed singer Johnny Gentle. Running from the 20th to the 28th of May 1960 across seven venues, it was the first concert tour the Beatles ever played. They were billed as Johnny Gentle and His Group.
Talent manager Larry Parnes auditioned several Liverpool bands on the 10th of May 1960. The Beatles were turned down for all available spots, but Parnes later contacted their manager Allan Williams directly to arrange the Scottish dates with Johnny Gentle. Williams had no other act available at such short notice, so the Beatles took the booking.
Adopting stage names was common practice in British pop at the time. For the Scottish tour, John Lennon went by Johnny Lennon, Paul McCartney became Paul Ramon, George Harrison used Carl Harrison, Stuart Sutcliffe chose Stuart de Stael, and Tommy Moore performed as Thomas Moore.
The exact setlist is not fully known. George Harrison recalled performing Teddy Bear and Wear My Ring Around Your Neck by Elvis Presley. Other reported songs include tracks by Buddy Holly, Ricky Nelson, Eddie Cochran, Jim Reeves, and Clarence Frogman Henry, as well as a second Elvis number.
John Lennon contributed to a song Johnny Gentle was writing during the tour, called I've Just Fallen for Someone. Gentle and the Beatles were described as friendly with each other throughout the run.