Cameron tells Iran - Britain wants to re-open Tehran embassy
"The Prime Minister expressed his hope that this deal would mark a fresh start in bilateral relations between the UK and Iran," Cameron's spokesman said of the telephone call.
"The Prime Minister made clear that he remained committed to re-opening the British embassy in Tehran," the spokesman said.
The British embassy was closed after hundreds of Iranian demonstrators stormed the building in November 2011.
(Reporting by Guy Faulconbridge; editing by Andy Bruce)