Iran       Obtain the appropriate visa well in advance of travel and arrange comprehensive insurance for your trip. Check the latest Foreign and Commonwealth Office Travel Advice before travelling.       Bring enough hard currency (particularly US Dollars) to cover your stay but make sure to declare this on entry. You can only exchange money in banks – not on the street, as this is illegal. Credit cards are of very limited use and, even then, only European Mastercards. Bank transfers to and from the UK are impossible and there is no Western Union or similar institution.       It is very important to obey Islamic laws and customs at all times during your stay, paying particular attention to dress standards and abstaining from the consumption of alcohol. You are not allowed to import alcohol, pornography, pork products, CD’s, videos or audio cassettes. Displays of affection between members of the opposite sex are illegal.       Always carry identification. Your passport is the best option and visitors are advised to bring a certified copy with them.       Enter next of kin details into the back of your passport.       Please register with the British Embassy on arrival in Tehran, no matter how short your stay, and consult the consular staff should any problem arise.       Do not get involved with drugs in any way. The penalties are extremely severe and can result in the death penalty.       Don’t overstay your welcome. Visa extensions are time-consuming and must be lodged at least one week in advance of the expiry date.       It is forbidden to take photos of or near government or military installation.