The live programme focuses on alternative youth culture.

The two-hour live programme focuses on alternative youth culture, including home-made underground music, which is not permitted by the Iranian authorities.

The programme also covers taboo topics such as dress code, slang, high unemployment rates, the increasing numbers of drug addicts and young prostitutes and the hidden lives of homosexuals.

'Zig Zag' is broadcast on Thursday evenings at 6pm GMT.

Virtual community

Around 70 percent of Iran's population is under 30 years old.

In a highly regulated environment, they have come up with their own, unique solution for expressing themselves more freely and communicating with each other.

They use a secret language and their own dress code, and increasingly use the internet to communicate.

This programme is the first chance they've had to hear each others voices, as well as to engage with more orthodox figures, such as religious leaders.

Format

During the first hour, the programme features phone-ins, discussions and radio features. In the second hour it switches to a music format, where unknown young artists are introduced and audiences can put their questions to their favourite pop stars during interviews.