Ken McCallum, director general of MI5, said in an annual speech outlining threats to the United Kingdom that 600 Russian officials have been expelled from Europe this year, 400 of whom his agency has identified as spies. CNN writes about it.

  "We have continued to work intensively to make the UK the most difficult possible environment for Russian covert action," McCallum said. “In the case of the UK, after we removed 23 Russian spies posing as diplomats, we denied more than 100 diplomatic visas on national security grounds… the big point is that the UK must be prepared for Russian aggression for many years ".

  McCallum said terrorism remains a constant threat and eight "potentially lethal conspiracies" have been terminated over the past year. He estimates that three-quarters of them are related to Islamist extremism and a quarter to far-right terrorism. He added that the latest extremism is increasingly appealing to young Britons, with "the youngest case I can think of is horrifying... when a person who could potentially pose a certain threat was 13 years old." He declined to give details.