I think that the UK should try to act in accordance with international law, which it seems Sir Keir is trying to do.

The reality is that the UK is not the most powerful nation in the world. If we decide to disregard international law, then it encourages the big powers (US, China, Russia) to disregard international law in their dealings with us. Do we want those powers to treat the UK in illegal ways?

A lot of people are. Though it doesn’t have to be to Tehran: anywhere will do