“Death to America, Death to Britain, Death to Israel,” the university students chanted, also calling for the expulsion of Britain’s ambassador to Iran, Richard Dalton.

Watched by dozens of police, they held aloft banners reading ”Britain, France and Germany: Axis of Evil”, and “NPT, we will leave you soon”, referring to the nuclear Non-Proliferation Treaty.

Several windows were shattered by stone-throwers. The British embassy in Tehran has in recent years been regularly targetted by stone-throwers angered by Britain’s participation in the US-led invasion of Iraq.