Rouhani warns of 'very dangerous response' if US makes another 'mistake,' while senior military leaders strike more defiant tone, say further 'revenge' will come

As Iranians breach nuclear deal in protest of US sanctions, British embassy says 'we are upholding our obligations to cooperate' with Tehran on modernizing Arak facility

Photos indicate Adrian Darya possibly preparing to unload oil, despite Tehran's assurances to UK it would not deliver cargo

Foreign Office summons Iranian ambassador for dressing-down, says recent moves by Islamic Republic 'designed to disrupt regional security'

PM thanks British counterpart for fighting anti-Semitism, leaves 10 Downing Street, in turmoil over Brexit, after merely 30 minutes; also set to meet US defense chief

A day after Tehran announces further violation of nuclear deal, and with Trump saying meeting with Rouhani is 'possible,' PM urges increased pressure on regime

Anousheh Ashouri and Ali Johari sentenced to 10 years for espionage, judiciary spokesman says

New British government remains 'strong supporters' of 2015 nuclear pact, says still the best way to prevent Tehran from acquiring atomic weapons

FM Zarif claims increased tensions are 'due to America's economic terrorism and Europe's inability to fulfill its commitments'

HMS Montrose had 85 'interactions' with Iranian forces during recent 27-day patrol, though contacts have built a 'healthy understanding' on both sides, Royal Navy man reveals