Iran’s President, Hassan Rouhani, has declared that talks with the United States would be “useless” – amid heightened tensions between the two countries. President Trump re-imposed strict sanctions on Iran after pulling out of an internationally agreed nuclear deal.

Britain has stayed in, but Iran is accused of violations and there have been months of international incidents.

I spoke to Brian Hook, the US Special Representative for Iran – and I asked him if this tension was heading towards military conflict.

Brian Hook: ‘Iran is resorting to its usual playbook of terror because it doesn’t like being told no’