Russian spy expulsion is big blow: UK MI5 chief

STORY: In his annual update on the threat to Britain, Security Service (MI5) Director General Ken McCallum also repeated warnings about Chinese attempts to influence lawmakers and those in public life, and Beijing's attempts to monitor and harass the Chinese diaspora.

McCallum said a massive number of Russian officials had been expelled from across the world including over 600 from Europe of which more than 400 were judged to be spies.

On China, the spy chief said the Chinese authorities were using all the means at their disposal to monitor and intimidate the Chinese diaspora.