All of Iran is currently checked "green" in the administration's outside travel exhortation, however fringe regions with Iraq, Pakistan and Afghanistan stay "red", a notice against all travel.
In an announcement, the Outside and Region Office said that English nationals ought to still deliberately consider the dangers of going to Iran, yet that the circumstance had changed under the administration of President Hassan Rouhani.
"Our strategy is to prescribe against go to a region when we judge that the danger is unsuitably high," Remote Secretary Philip Hammond said in an announcement.
"We consider that keeps on being the situation for particular regions of Iran, eminently along Iran's outskirts with Iraq, Afghanistan and Pakistan.
"Yet, we accept that in different regions of Iran the danger to English nationals has changed, to a limited extent because of diminishing antagonistic vibe under President Rouhani's administration."
England, China, France, Russia, the United States and Germany came to a long-slippery understanding this month to utmost Iran's atomic exercises in return for lifting endorses that have disabled the nation's economy.
The English government has said it would like to revive its international safe haven in Tehran before the current year's over. It was shut in 2011 in the wake of being raged by dissenters.