The Foreign and Commonwealth Office (FCO) advise against all travel to within 100km of the entire Iran/Afghanistan border; within 10km of the entire Iran/Iraq border; the province of Sistan-Baluchistan; and the area east of the line running from Bam to Jask, including Bam.
The FCO advise against all but essential travel to the rest of Iran.
British travellers to Iran face greater risks than nationals of many other countries due to high levels of suspicion about the UK and the UK government’s limited ability to assist in any difficulty.
There’s a risk that British nationals could be arbitrarily detained in Iran despite their complete innocence. British nationals were arbitrarily detained in 2010 and 2011, and there is a risk of this occurring again. A group of eight Slovak paragliders were arrested in May 2013 and three US hikers were arrested near the Iraqi border in 2009.
Independent travellers, especially (but not exclusively) if going off the beaten track, face greater risk than those in tour groups or business visitors. See Safety and security.
During a demonstration on 29 November 2011 the British Embassy in Tehran was attacked and set on fire. The Embassy is now closed and is unable to provide any consular services.
On 20 February Sweden ceased to be the protecting power for British interests in Iran; this follows the appointment of non-resident Chargés d’Affaires in November 2013. British nationals requiring urgent consular assistance in Iran should contact any EU Embassy in Tehran, including the Swedish Embassy. See Consular assistance.
Dual nationality is not recognised in Iran. The Iranian authorities will deny that the British government has any legitimate responsibility for British Iranians and is unlikely to grant any consular access.
There is a general threat from terrorism. See Terrorism.
Take out comprehensive travel and medical insurance before you travel.