Iran threatens to set fire to shipping in Gulf amid ongoing conflict

Iran has threatened shipping in the Persian Gulf and Straits of Hormuz as fighting between the country and the US and Israel escalates. Today, US President Donald Trump says he took the decision to launch a war against Iran because it was the "last, best chance" to stop the country's regime. We devote the entire programme to the conflict, and enlist a panel of experts to guide us through it: Rana Rahimpour is an Iranian-British journalist and former BBC Persian presenter and reporter; Kirsten Fontenrose was senior director for the Gulf at The US National Security Council in the first Trump Administration; and Sir Simon Fraser is a former head of the Foreign Office, now Chair of the British foreign policy institute Chatham House.

Here in the UK, Sir Keir Starmer has said the UK's decision not to join the US-Israeli strikes on Iran was "deliberate", adding his government "does not believe in regime change from the skies". We assess the state of relations between the US and UK.