Britain is the most corrupt country in the world, according to journalist Roberto Saviano, who spent more than a decade exposing the criminal dealings of the Italian Mafia.

Mr Saviano, who wrote the best-selling exposés Gomorrah and ZeroZeroZero, made the comments at the Hay Literary Festival. The 36-year-old has been living under police protection since publishing revelations about members of the Camorra, a powerful Neapolitan branch of the mafia, in 2006.

He told an audience at Hay-on-Wye: “If I asked you what is the most corrupt place on Earth you might tell me well it’s Afghanistan, maybe Greece, Nigeria, the South of Italy and I will tell you it’s the UK.