The prime minister has addressed ongoing tensions between the US and Iran in an interview with BBC Breakfast.
Boris Johnson said that “clearly Iran made a terrible mistake”, but added that the “most important thing is tensions in the region calm down.”
The Iranian president, Hassan Rouhani, has called the shooting down of a Ukrainian passenger plane that killed 176 people an “unforgivable error”.
The incident followed the killing of Gen Qasem Soleimani, Iran’s second most powerful man, in a US drone strike in Iraq.
Read more: Iran denies shooting anti-government protesters
Watch the full interview with the prime minister on BBC iPlayer.