The European Union and Russia both say they are optimistic that the US and Iran will successfully renew the two countries’ 2015 nuclear deal as negotiations draw to a close in Vienna. The expression of optimism comes as the US described the talks as ‘constructive’ and Iranian Deputy Foreign Minister Abbas Araghchi said the two countries had reached a ‘new understanding’. The indirect talks in Vienna were organised with the goal of re-establishing limits on Iran’s uranium enrichment programme in return for the lifting of US economic sanctions.