The Beatles: How to make the greatest songwriting partnership in history

If there were a BC/AD moment for modern popular culture, there can’t be a better contender than a church fete in suburban Liverpool where a 15-year-old James Paul McCartney met a 16-year-old John Winston Lennon. Twenty three years later, one of them was dead, murdered by a man who wanted to be famous for killing him, leaving a body of music, composed wi…