So is British Foreign Secretary William Hague.British Prime Minister David Cameron had earlier promised "very tough action" following the violent scenes when around 200 protesters rampaged for hours through Britain's two diplomatic compounds in Tehran.
They tore down the Union Jack, ripped up pictures of Queen Elizabeth II, trashed embassy offices, set documents alight, and briefly blocked the movements of six diplomats.
Iranian police, who initially appeared to do little to prevent the violence, eventually forced protesters to leave after firing tear gas and clashing with them, Hague said.
"The idea that the Iranian authorities could not have protected our embassy or that this assault could have taken place without some degree of regime consent is fanciful," he said
And the chairman of the Iranian parliamentary national security and foreign policy commission didn't exactly ease concerns.British Foreign Secretary William Hague accused the Iranian government of tacit support for Tuesday's attack by hundreds of demonstrators, though he stopped short of cutting diplomatic ties altogether.
"If any country makes it impossible for us to operate on their soil they cannot expect to have a functioning embassy here," Hague said in a speech to parliament.
To cheers from lawmakers, Hague said he had ordered all Iranian embassy staff to leave Britain within 48 hours and closed the mission in London immediately.
Britain expels Iranian diplomats after embassy attack - Yahoo! NewsBut prominent Iranian MP Aladdin Brujerdi, the chairman of the Iranian parliamentary national security and foreign policy commission, on Wednesday said "Britain is responsible for all the repercussions of its action".
"We recommend other European nations not follow the policies of Britain and the United States," Brujerdi said.
Iran's foreign ministry had earlier expressed "regret" over the incident, and a senior policeman was quoted as saying that some protesters had been arrested.
But parliamentary speaker Ali Larijani defended the protesters, saying they had been angered by the British government and "decades of domineering moves by the British in Iran".
This could be a significant turning point in Iranian relations with the West. It seems almost all of the EU is considering pulling their embassies along with the UK ordering Iran to evacuate it's embassy in the Britain.