With a 6-3 majority, the Supreme Court ruled President Trump exceeded his authority when he imposed tariffs via a law reserved for national emergencies. The president has used Nixon-era legislation to impose new, albeit temporary, tariffs.

Also on the programme: the BBC understands the government is considering legislation to remove Andrew Mountbatten-Windsor from the royal line of succession.

And we hear from the scientist behind our ‘nature notes’ series. What does the habit of observing the natural world give us in return?