The World Tonight

Allegations of 'family voting' in the Gorton and Denton by-election are to be raised in parliament on Monday. We speak to Lord Pickles, whose report into electoral fraud called for action a decade ago. We also look at where the by-election leaves Labour strategy: are Reform or the Greens their main opposition now? Also:Bill Clinton testifies in front of a Congressional committee; President Trump says he's "not happy" as concerns grow about a possible US attack. And 30 years of Pokemon.

It’s expected to be a close race between Labour, Reform UK, and the Greens. We hear from the count and speak to political scientist Paula Keaveney about the apparent fragmentation of British politics.

Also on programme: Democrats on the Republican-led House Oversight Committee have defended the former US Secretary of State Hillary Clinton after her deposition about the late sex offender Jeffrey Epstein.

And the television series Our Friends in the North is adapted for the stage. Writer Peter Flannery and actor Christopher Eccleston discuss the show’s enduring success.

The government has said it is not pausing legislation that would see the Chagos Islands transferred to Mauritius. That's despite Foreign Office minister Hamish Falconer telling Parliament that the process would be paused "for discussions with our American counterparts". A government spokesperson said Falconer had "misspoken".

Also on the programme: as more shops use facial recognition technology to deter shoplifters, we find out what it’s like to be falsely accused.

And new research uncovers clues to the origin of the organ that gave Charles Darwin a "cold shudder": the eye.

Lord Mandelson was released in the early hours of Tuesday morning - and tonight lawyers for the former UK Ambassador and Labour minister have said he'd been arrested on "a baseless suggestion" that he was planning to leave the country.

Also on the programme: As the government prepares to introduce its criminal justice reforms, a justice minister insists they won't back down on plans to reduce the number of jury trials.

And there has been a dog among the swans tonight - but a friendly one: the co-owner of Swansea City Football Club - the American rapper Snoop Dogg - attends a home game for the first time.

The investigation that led to the arrest was triggered by emails in the Epstein files which appeared to show Lord Mandelson allegedly communicating with Epstein, including one exchange about rumours of an EU bailout.

Also on the programme: the government unveils plans to overhaul the special educational needs system in England.

And lots of people say weasel words are great, but what do actually we mean when we use these evasive phrases?

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.