The Prime Minister spoke to Hassan Rouhani by telephone this afternoon ahead of negotiations over Tehran’s nuclear ambitions in Geneva this week.
A Downing Street spokesman said: ” The two leaders discussed the bilateral relationship between Britain and Iran welcoming the steps taken since President Rouhani took office, including the appointment of non-resident Charges d’Affaires last week.
“They agreed to continue efforts to improve the relationship on a step by step and reciprocal basis, London Evening Standard informs.
“On Iran’s nuclear programme, both leaders agreed that significant progress had been made in the recent Geneva negotiations and that it was important to seize the opportunity presented by the further round of talks which get under way tomorrow.
“The Prime Minister underlined the necessity of Iran comprehensively addressing the concerns of the international community about their nuclear programme, including the need for greater transparency.”