The head of MI5, the UK’s domestic security service, revealed that its spies had disrupted a new threat from China in recent days, as he expressed frustration over the collapse of a espionage case linked to Beijing.

“We’ve intervened operationally again just in the last week,” MI5 Director-General Ken McCallum told reporters on Thursday, declining to elaborate on the nature of the activity. “Do Chinese state actors present a UK national security threat? The answer is: Of course, yes, they do — every day.”

The suspects have denied the allegations.

Prime Minister Keir Starmer has redirected blame toward the prosecutors and the Conservative government that was in power when the charges were first brought. On Wednesday, he released witness statements by Deputy National Security Adviser Matt

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