British Foreign Secretary William Hague spoke Tuesday afternoon to his Iranian counterpart Mohammad Javad Zarif to discuss an array of issues of common concern, and welcomed the implementation of the interim nuclear deal signed between Iran and P5+1 Group."The Foreign Secretary welcomed the entry into force yesterday of the Joint Plan of Action on Iran's nuclear programme, describing it as an important milestone and a positive step towards addressing some of the most serious concerns about Iran's nuclear programme," read a statement by the British Foreign Office."He reiterated to Foreign Minister Zarif the UK's strong commitment to working with our E3+3 (or P5+1) partners and Iran to achieve a full diplomatic resolution to this issue, and to beginning negotiations on a comprehensive settlement next month." The statement added that two senior officials also discussed the conflict in Syria and bilateral relations."The Ministers discussed the conflict in Syria. The Foreign Secretary emphasised the importance of the Geneva Communique of June 2012 as the basis for ending the conflict in Syria, and said the UK remained open to working with Iran on that basis in the future," the statement said."Both Ministers welcomed visits by respective non-resident Charge d'Affaires and agreed that bilateral relations should develop on a reciprocal and step-by-step basis."