Sir Ken McCallum says operations to tackle terrorism and state threats are now roughly of an "equal scale".
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The Papers: 'Spy chief's grim warning' and 'tiger victim was child actor'
Wednesday's papers are dominated by coverage of a speech given by the MI5 chief and the death of a man in a tiger enclosure.
What we know about the man who died falling from a Six Flags rollercoaster
Hassan Jihad Ibn Kariem died on Monday after police say he was ejected from a ride at a Six Flags amusement park in Georgia.
Pope diagnosed with lung cancer but had successful surgery, Vatican says
Pope Leo had successful surgery to remove a lower lobe of his right lung, the Vatican said.
Our memorial garden helps us grieve - a cemetery felt too far away
Emma Moore shares how creating a special place at home has helped her family.
Family pays tribute to 'warm and engaging' man killed in tiger attack
William Chapman was attacked by the tiger after he entered its pen at Yorkshire Wildlife Park.
Gales and heavy rain to impact UK as yellow wind warning issued
The Met Office has issued a yellow warning for wind in north-west Scotland on Wednesday with 70mph gusts possible, as Ben Rich explains.
Robot seized by German police after allegedly groping teenage girl
Police have launched an investigation on suspicion of sexual harassment after the robot's owner, 16, and his companion are said to have streamed the incident.
Germany puts Ukrainian on trial accused of blowing up Nord Stream pipelines
Four years after the attacks, Serhii K will appear in court accused of a plot to destroy Russia's gas pipelines to Germany.
Pictured: Winning entries for Wildlife Photographer of the Year 2026
Striking images including an urban coyote and an elephant carrying a dead calf are among this year's winners.
Is it OK for jobseekers or employers to use AI?
Graduates are increasingly using AI to misrepresent themselves in job applications, research suggests. But some say their peer group has no choice.
Royal Mail losing 400 postal workers a week, says union
The CWU says more posties are leaving since a new delivery system was brought in, that it claims is not working in hundreds of offices.
Saka responds to Arteta's challenge with 'huge impact'
Bukayo Saka responds to the challenge set by Mikel Arteta as he comes off the bench to change the game against Lille in the Champions League.
Actress Selma Blair faces charges for kicking nurse and officer after plane incident
The Legally Blonde actress faces two counts of assault for allegedly kicking a police officer and a nurse after allegedly attacking attendants on a flight.
Missiles intercepted near Riyadh after Saudi coalition hits Yemen fuel depot
The Saudi-led coalition fighting in Yemen struck a fuel depot near the Houthi-controlled capital, Sanaa.
'Unplayable' Stanway a free-scoring warrior for Lionesses
Whatever the game, whatever the result, Georgia Stanway always seems to score for England.
Martinez issues scathing attack on Man Utd board - has he made things worse?
Lisandro Martinez launches a blistering attack on Manchester United's hierarchy for not strengthening the squad following qualification for the Champions League.
Martinez issues scathing attack on Man Utd board - has he made things worse?
Lisandro Martinez launches a blistering attack on Manchester United's hierarchy for not strengthening the squad following qualification for the Champions League.
Saudi man charged with planting 'sophisticated' recording device in OpenAI office
Prosecutors say the device, wrapped in toilet paper, was found inserted in a USB port on the back of a TV in an executive conference room.
Zelensky and Burnham to meet in Downing Street
The prime minister is calling for partners to step up support for Ukraine following Trump's criticism of Zelensky.
Couple and two children killed in arson attack named locally
A "multiple murder" investigation has been launched by gardaí (Irish police) following the blaze.