A UK Parliament researcher has been detained under the Official Secrets Act on suspicion of espionage for China.

Police confirmed that two individuals, one in his twenties and the other in his thirties, were arrested under the legislation in March.

According to sources, one of them was a legislative researcher interested in foreign politics.

According to the Sunday Times, the researcher had connections to many Conservative MPs.

On Sunday morning, No. 10 said that Rishi Sunak had conveyed worries about Chinese meddling to a top Chinese official.

A spokesperson said the prime minister had met Chinese Premier Li Qiang during the G20 summit in India, and “conveyed his significant concerns about Chinese interference the UK’s parliamentary democracy”.

Chinese President Xi Jinping is not attending the summit.