Hossein Rassam, the British embassy employee accused by the Iranian authorities of acting against Iran’s national security, has been released from detention on bail on Sunday.

Abdolsamad Khorramshahi said Mr Rassam, whose detention along with eight other embassy staff in Tehran last month caused a diplomatic row between the UK and Iran, was still charged with “acting against national security”. Several of those detained were accused of being involved in the post-election protests that followed the controversial re-election of Mahmoud Ahmadi-Nejad on June 12.