11:52

David Cameron has spoken to the Iranian president Hassan Rouhani following the lifting of sanctions. The PM said it was a very good day for international relations and congratulated the Iranians on thesteps they have taken so far.

“It was warm with a real flow of discussions between them, and they talked about it paving the way for stronger economic cooperation,” Cameron’s spokesman said.

The UK re-opened its embassy in Tehran last year, four years after it was shut down as a result of a mob attack. However, the UK still only has a UK chargé d’affaires there and is currently in discussion about raising representation to ambassador level.

In the 20-minute conversation, Cameron raised concerns about some dual UK-Iranian nationals held in Iranian prisons and pressed the president for an Iranian representative to come to the London conference on Syria.