The government's deputy national security adviser said China was carrying out "large scale espionage" activities against the UK when asked to provide evidence in the now-collapsed case against two men accused of spying for China.
In a witness statement provided to prosecutors in 2023, Matthew Collins was asked to assess whether Beijing was regarded as a threat to national security at the time two men - Christopher Cash and Christopher Berry - were accused of spying on MPs.
Collins also said in February 2025 that China's spying threatened "the UK's economic prosperity and resilience".
But he made clear the government was "committed to pursuing a positive economic relationship with China".
The three statements by Collins were given to prosecutors in December 2023, February 2025 and August 2025, and were published by the government on Wednesday night.
