Masoud Pezeshkian's victory in Iran's presidential elections has given a rare boost to efforts for scaling down years of tensions over Tehran's nuclear programme, even with no indication of any upcoming breakthrough in the crisis.
Pezeshkian's defeat of ultra-conservative Saeed Jalili, a former chief nuclear negotiator whose intransigence and style made him notorious among Western diplomats, is a relief for European governments as they seek to maintain dialogue on the issue.
