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
the area east of the line running from Bam to Jask, including Bam
At present the British Embassy can only offer a limited consular service. If you need routine consular assistance in Iran you should contact the Foreign and Commonwealth Office on +44 20 7008 1500.
If you need emergency consular assistance, including an emergency travel document, you should contact the Swedish Embassy in Tehran.
Re-establishing a full consular service is a priority and we hope to be in a position to offer this within the next few months.
There is a general threat from terrorism. See Terrorism
Take out comprehensive travel and medical insurance before you travel.