The World Tonight

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?

He was arrested Thursday morning on suspicion of misconduct in public office. We hear from our correspondent outside Buckingham Palace, a former press chief in the Royal household, a former Minister who opposed Andrew becoming UK trade envoy, and we look at how the Royal family has recovered from previous crises. Also tonight: scientists have just announced that a unique vaccine they've developed could have universal application against colds, 'flu, bacterial infection and allergies.

The BBC has uncovered new evidence that vulnerable girls and young women in London are being groomed by gangs to carry drugs and have sex. We discuss the findings with the former head of the National Crime Agency's Child Exploitation Command.
Also on the programme: the day after the US State Department approved the UK's Chagos Islands deal, President Trump launches a new attack on it.
And the symphonic sounds hidden in the freezer aisle of a Sheffield supermarket.

Reverend Jesse Jackson, a giant of the civil rights movement, has died at the age of 84. As politicians from across the spectrum pay tribute to his legacy, we speak to his son, who was with him when he died. 
Also on the programme: Labour faces a mass resignation of councillors in Hartlepool over funding for children in care. The local Labour MP tells us he’s “furious”. 
And as China celebrates the Lunar New Year, an astrologer tells us what to expect from the Year of the Fire Horse.

Parents in north London have been told their children could be excluded from school if they are not fully vaccinated against measles amid an outbreak of the highly contagious disease. We find out what’s caused the latest outbreak.
Also in the programme: In an interview with the BBC, Hillary Clinton accuses the Trump administration of a cover-up over Jeffrey Epstein. And musician Patrick Darling, who was diagnosed with motor neurone disease (MND), has returned to the stage after artificial intelligence (AI) gave him his voice back.