SHARE Talks on reviving the Iran nuclear deal moved forward in Vienna on Tuesday with diplomats preparing to draw up “concrete measures” the US and Iran could take. The EU said a meeting between Iran and the remaining parties to the deal – Britain, France, Germany, Russia and China – had been “constructive” and ended with “unity and ambition” towards salvaging the agreement. A US delegation was based at another hotel in the Austrian capital, with European diplomats acting as mediators between Washington and Tehran. Earlier on Tuesday, Iran welcomed “promising” signs that Joe Biden’s administration was willing to lift sanctions reimposed by Donald Trump in 2018.