Aidy Boothroyd (Watford)
After being appointed Hornets boss at the age of just 34 and with no previous experience as a manager, there was a great deal of scepticism about Boothroyd. However, he managed to guide the team to promotion to the Premier League within 14 months of his appointment.
Even so, Boothroyd’s limitations were soon exposed in the top flight where he won only five of 38 league games, finishing at the bottom of the Premier League with just 28 points. He is currently England’s Under 21 manager.