If it wasn't for people like me, the police wouldn't have a job
– Lee Doran
With the World Cup just two days away, many of us are gearing up for watching the games in a local beer garden and getting into the sporting spirit, but for some fans it's all about creating trouble and causing violence.
New documentary Football Hooligan and Proud takes a look at some of the most violent football hooligans living in England. We're joined by Lee Doran who features in programme. Lee is a self-confessed hooligan, banned from all UK grounds.
But what drives hooligans? Why do they thrive on violent behaviour? And is it all worth it? Former undercover policeman James Bannon can provide some answers - he infiltrated a notorious football gang during the 1980s.