Meet the crews who think nothing of using tear gas, meat hooks, home-made bombs and worse. They come from all corners of the globe: from Brazil, Croatia, Argentina, Italy... and for these football hooligans, their team is their life.

In a quest to find the most fanatical football hooligans on the planet, author Dominic Utton visited nine countries in three months with Danny Dyer, and the team behind the hit TV series. Shot at, stoned, glassed and tear-gassed, he survived gunfire in Brazil and a riot in Poland.

Full of spine-chilling encounters, extraordinary characters and brutal clashes, The Real Football Factories shows that football hooliganism is alive and kicking all over the world.