Negotiations resume today to find a deal to allay international concerns about Tehran’s nuclear drive.Despite a defiant Iran declaring it would raise the levels of its enriched uranium if no deal was reached, representatives of the UN atomic watchdog, the IAEA, expressed satisfaction at the end of day one. Mohamed El Baradei, the IAEA’s Director General said: “We had a good afternoon, quite a constructive meeting. We are off to a good start; most of the technical issues have been discussed.” The chief proposal backed by world powers is for Iran to send its enriched material abroad to be converted for use in a research reactor. This would delay its ability to produce a bomb – something Iran denies is its aim. In a move to off-set harsher UN sanctions, Iran has agreed in principle to send some of its low-enriched uranium to Russia but says it won’t stop the process entirely.