State threats and AI: Key takeaways from MI5 chief's speech

The head of MI5, Sir Ken McCallum, has given his annual speech at the intelligence service's headquarters in London.

Sir Ken spoke about counter-terrorism, combatting state threats and warned about the emerging threat posed by AI (artificial intelligence).

BBC Security Correspondent Frank Gardner was in the room during the speech and takes us through the key takeaways.

More on this story: MI5 chief warns of threats to UK from Russia, Iran and AI

4 hours ago

A splitscreen image. On the left, Lucy Manning. On the right, two police officers with their backs turned to the camera

Why the search warrants were deemed unlawful and what happens next?

Special correspondent Lucy Manning explains why the Hight Court has ruled that search warrants used to search Mr Mountbatten-Windsor's home were unlawful.

A composite image of the BBC's Politics Investigations Correspondent, Billy Kenber, and an Immigration Enforcement Officer attending an address

Watch: Police raid on gang behind fake gay asylum claims

The arrests come after a BBC investigation in April revealed that law firms and advisers were helping migrants pose as gay in an effort to get asylum.

Split-screen showing correspondent Frank Gardner on the left, and a bomber departing on the right

Watch: What caused the US to remove its bombers in such a hurry?

The Pentagon confirmed on Sunday it had removed its bombers - thought to be about a dozen B-1s - from the base back to their home stations in America.

Split image with Andrew Mountbatten-Windsor on the left and Noor Nanji on the right

What we know about Andrew Mountbatten-Windsor's legal action against police

Andrew Mountbatten-Windsor is taking legal action against Thames Valley Police over his arrest in February.

Split-screen showing correspondent Daniel Sandford on the left, and three white vans on the right

Watch: Detail about new call to police changes RAF Fairford timeline

One of five men arrested near RAF Fairford in the early hours of Sunday morning had dialled 999 himself, the BBC understands. BBC's UK correspondent Daniel Sandford explains the timeline of events.

Andy Burnham delivering a speech, standing with his hands held apart

Watch: Burnham says UK could go 'all the way' towards rejoining EU

Andy Burnham says rejoining the EU is among options the government could look at - telling the BBC the current Brexit settlement has caused "more harm than good".

Daniel Sandford (l) and an armed police officer with a 'police stop' sign in the foreground (r)

What happens next in the RAF Fairford investigation

BBC correspondent Daniel Sandford explains where the investigation goes from here.

Split screen of Arabella Pepper and Alex Millington-Cotes

'We don't know where he is,' relatives of Sir Ranulph Fiennes tell BBC

Speaking to BBC Newsnight, his sister-in-law told the BBC that she did not know where he was, and nobody had been able to see him.

BBC correspondent Daniel Sandford pictured in a suit in front of New Scotland Yard sign, with another aerial shot of white vans at RAF Fairford

Watch: RAF Fairford suspects are bailed, what happens now?

The men were all UK nationals in their 20s who live in London and were arrested under the Explosives Act and on suspicion of preparing a terrorist act.

Split screen image. On the left, a bomb disposal robot next to two white van. On the right, BBC correspondent Frank Gardner

Watch: Were the arrests near RAF Fairford 'pure luck'?

A farmer who called 999 when she saw a group of "masked men" near RAF Fairford early on Sunday believes she "foiled" their plans by "pure luck".

A plane at RAF Fairford and BBC journalist Alastair McKee

BBC reports from RAF base after major incident declared

A major incident has been declared near RAF Fairford after several men were arrested on suspicion of offences under the Explosives Act, Gloucestershire police say.

Split screen of Jonathan Beale and a satellite in space.

Watch: The arms race in space and how the UK is defending itself

The UK has jammed satellites to defend itself from hostile threats, the BBC has been told.

Earl Spencer and the then Prince Charles stand talking, dressed in suits

Earl Spencer's claims about King's reaction to Diana's death open old wounds

His comments come ahead of a controversial new memoir examining the life and death of Princess Diana

Wide shot showing presenter Laura Kuenssberg in front of Earl Spencer in library

Watch: Earl Spencer says he felt Charles had 'giddy tone' during call after Diana's death

Princess Diana's brother has been interviewed by the BBC ahead of the release of his book on the late Princess of Wales.

Man with white hair wearing blue shirt and navy cardigan

Watch: Emotional Earl Spencer says he misses sister Diana every day

"This is my swan song too. I'm not here to bang on about Diana, this is my final word, celebration of her", Earl Spencer told presenter Laura Kuenssberg.

Watch: Diana's brother says press has 'cancerous influence' on Harry and Meghan's lives

Earl Spencer says that he can see echoes of Princess Diana's treatment from the press in the way Harry and Meghan are scrutinised.

A composite image of Laura Kuenssberg and Earl Spencer

Watch: Diana's brother says Charles 'went ballistic' in phone call after her death

Earl Spencer spoke exclusively with the BBC's Laura Kuenssberg about claims he has made in a new book.

Earl Spencer split screen with BBC reporter Helena Wilkinson.

Royal row intensifies after fresh claims in Diana's brother book

Diana’s brother has published fresh claims about King Charles saying he was "giddily elated" in a phone call after the death of the Princess of Wales.

The Duke and Duchess of Sussex listen to a music class

Watch: What's behind the decision to review Harry and Meghan's UK security?

The Duke and Duchess of Sussex are going to be given a review of their publicly-funded security after their return to live in the UK.

Paul Smith talks to be BBC in a room filled with esoteric items.

British designer Paul Smith: 'Nobody cares how good you used to be in fashion'

The celebrated British fashion designer invited BBC News to his office to talk about his career and a rubber chicken.