The Fourcast (Signed)

Krishnan is in Iran, speaking to supporters of the regime and, in a rare interview, one of its most prominent critics. Sadegh Zibakalam is an academic who's spent years calling for reform.

A ceasefire has been announced between the US and Iran. But is this the end of the conflict, or just a pause before the next confrontation?

Keir Starmer has resigned as Prime Minister, triggering a leadership transition in Labour. Andy Burnham is the front-runner to succeed him. So what happens next?

Starmer unveils his long-awaited defence plan. Matt Frei, Mark Urban and Lindsey Hilsum assess drones, modern warfare, Ukraine, Crimea and whether the UK is ready for future threats.

Economist and activist Gary Stevenson tells Channel 4 News that the incoming Prime Minister will fail unless he's willing to properly tax wealth

After another record-breaking heatwave, experts estimate that thousands of excess deaths may already have been linked to the extreme temperatures