Talking to journalists, Mr Netanyahu said he doubted that the "genocidal regime" of President Mahmoud Ahmadinejad was "deterrable". This view was shared by Shmuel Bar, an Islamic specialist at the Herzliya centre, who said that the US and Iran were engaged in "very dangerous brinkmanship". He said that seen from Tehran, "the conspiracy theory goes that the US, with the UK and Israel, will take action to topple the Islamic regime, and that this has nothing to do with the nuclear issue."

Tehran has shown no sign of yielding to UN demands to halt uranium enrichment. "The resolution was born dead and even if they issue 10 more it will not affect Iran's economy and policies," Mr Ahmadinejad said yesterday in a televised speech.