#1 Angel Di Maria (£59.7m) - Real Madrid to Manchester United

Manchester United shattered the British transfer record when Angel Di Maria joined the Red Devils from Real Madrid for £59.7m. Di Maria was already a household name before, and United seemed to have finally found the superstar fit for their coveted No. 7 Jersey. However, even though he showed his class initially, Di Maria never settled down at Old Trafford, for varied reasons.
He played 32 games for United under Louis Van Gaal, scoring four goals, but could not adjust himself to the Premier League. United ultimately sold him to PSG next season and the fairy tale ended without too much fuss. He currently plays for the Ligue 1 side and has scored 52 goals in 135 games, redeeming some old his old reputation, but unfortunately, he shall still be known as one of football's costlier flop, until of course, someone else breaks his record in the near future.