Beatles stars John Lennon and Paul McCartney "weren't interested" in this one track - but when they recorded it, it went on to sell almost half a million copies.

Paul McCartney and John Lennon - who had an often fiery relationship, with Lennon admitting he once 'regretted' giving McCartney so much influence - weren't just writing hits for The Beatles in the '60s;

Lennon’s weaknesses proved to be McCartney’s strengths, while their shared music tastes created a bedrock upon which the Fab Four built their legacy