Senior officials from the European Union and Iran have made "very good progress" in talks in Geneva on the implementation of a landmark nuclear deal, the EU said this evening.

The officials met yesterday and today to discuss remaining practical issues to put in place the 24 November deal.

Under the deal Iran agreed to curb its most sensitive atomic work in return for some relief from western economic sanctions.

"Deputy Secretary General [Helga] Schmid and Deputy Foreign Minister [Abbas] Araqchi made very good progress on all the pertinent issues," EU spokesman Michael Mann said, referring to the EU and Iranian officials.

He added, however, that any agreements had to be validated by the governments of Iran and the six world powers negotiating with the Islamic Republic over its atomic work: the United States, Russia, China, France, Britain and Germany.            

The EU liaised with Iran on behalf of the six.