There was no doubting the stardom of The Beatles when they emerged on the scene in the early 1960s. The Fab Four were stars, not least John Lennon and Paul McCartney, who, with their widening grins and endless bank of original songwriting, were ready-made superstars for this bright new era. And they were up for it initially, soaking up every ounce of stardom their music was offering them. But then for Lennon at least, things quickly changed. The…