Meeting comes amid fears Middle East tensions will lead Iran to redouble its efforts to acquire a nuclear weapon

Iran’s deputy foreign minister, Majid Takht-Ravanchi, will meet his European counterparts in Geneva on Friday after the collapse of a deal last week under which Iran would have limited its uranium enrichment to 60% purity, just below the threshold to make nuclear weapons.

The offer was regarded by Iran as a first step to rebuilding confidence between it and the west over what it insists is its civilian nuclear programme. There are growing fears that wider tensions in the Middle East could result in Tehran redoubling efforts to acquire a nuclear weapon and trying to declare it necessary for its national self-defence.