There is a british embassy in Iran. https://www.gov.uk/world/organisations/uk-for-iranians https://www.gov.uk/world/organisations/uk-for-iranians In fact the fo

There is a british embassy in Iran. https://www.gov.uk/world/organisations/uk-for-iranians https://www.gov.uk/world/organisations/uk-for-iranians In fact the foreign office advises against all but non-essental travel for British-Iran dual nationals. For british citizens there is only a recommendation against travel to certain parts. For many other citizens it's, arguably, even safer.