Denis Sergeev is thought to have been the on-the-ground commander for the 2018 poisonings.
More than 250 people seeking relocation to the UK - many in hiding - were mistakenly copied into an email.
"I walk a tightrope every day on this, but we've got to fight for it," the BBC director general says.
A 31-year-old has been arrested on suspicion of murder and remains in custody.
Michelle O'Neill warns that healthcare staff are facing "a very difficult winter".
Louise Powell says her baby died "due to errors" made after she went into labour in prison.
Insulate Britain protesters blocked traffic on both carriageways of the motorway in Surrey earlier.
The court said Russia's failure to explain evidence pointing to its role in the spy's death led it to conclude it was responsible.
Jim Allister's bill would ban political appointees with serious convictions from positions on public bodies.
Foreign Secretary Liz Truss spoke to the US Secretary of State about the need for justice.
Price rises will be limited to 12% as Business Secretary Kwasi Kwarteng rejects fears of power cuts.
Twenty years ago, a young African boy was murdered and his torso was dumped in the Thames. It's the longest unsolved child murder case in the recent history of the Metropolitan Police.
Boris Johnson is meeting US President Joe Biden in the Oval Office in Washington DC on Tuesday.
Calvin Barrett flies from the US to the UK to meet his "Ma" after tracing her through a DNA test.
An MP wants women and their partners to get three days' sick pay if a pregnancy ends before 24 weeks.
Data from half England's specialist services found a fifth have waited more than 12 weeks in the pandemic.
Duke of Cambridge reveals Prince Philip's mustard-squirting antics in a poignant BBC documentary.
John Cossham wants more people to take up composting to encourage a circular economy.
The BBC followed Iranian migrant Alex, as he tried to cross from France to the UK with a smuggler.
The personal reflections on the Duke of Edinburgh's sense of humour are part of a BBC documentary.