The Turkish-led deal calls on Iran to ship about 1,000 kilograms of its low-enriched uranium, as well as its entire 30 kilogram stockpile of 20-per cent enriched uranium, to a safe location.

In return, France and Russia will supply ready-made fuel rods for the medical isotope reactor for which Iran says it has been enriching uranium to 20 per cent – a level which halves the time needed to manufacture weapons-grade material…

France, Russia and the United States have also been involved in the negotiations, which began after a meeting between Ahmed Davutoglu, Turkey’s foreign minister, and Iranian officials in Bahrain earlier this month.