Iran has upped the ante by announcing this week that it had breached the internationally-agreed limits on its enriched uranium stocks set under the July 2015 landmark nuclear deal.

Iran’s Foreign Minister Javad Zarif confirmed to state news agency Irna on 1 July that “Iran had passed the 300-kg limit of enriched uranium according to the plan we had announced earlier” – a reference to an 8 May threat to EU countries to uphold their side of the 2015 nuclear deal known...