TEHRAN, IRAN - NOVEMBER 29:  A protester holds a baton in the air as police in riot gear hold a large number of demonstrators attempting to storm the British Embassy in front of security gates during an anti-British demonstration in the Iranian capital on November 29, 2011 in Tehran, Iran. Relations between the two countries have soured further over recent weeks, with the UK Treasury imposing sanctions on Iranian banks, accusing them of supporting the country's nuclear programme. The Iranian authorities insist that its nuclear plans are for peaceful purposes only and parliament has voted to downgrade diplomatic relations with the UK.  (Photo by FarsNews/Getty Images)