Frank Coughlan: Capturing the enigma that is Paul McCartney would be the biggest triumph of Paul Mescal’s career

It seems like The Beatles have always been with us – an indispensable part of our popular culture for over 60 years and, in many ways, the very definition of it. If the world shifted on its axis in the 1960s, finally casting off the shadow of post-war gloom, it was Liverpool’s Fab Four who singularly symbolised the revolution..