Iran and Europe seek to break nuclear impasse before return of Trump

Talks held in Geneva as Iran looks to avoid potential snapback of UN sanctions over nuclear programme

Iran and the so-called E3 grouping of the UK, France and Germany have agreed to continue holding talks in the near future in an attempt to find a way out of an impasse over Tehran's nuclear programme, in what may be the last chance of a breakthrough before Donald Trump takes up the US presidency again.

Trump, who pursued a policy of maximum economic pressure" against Iran during his first term, returns to the White House on 20 January.