UK Prime Minister Rishi Sunak has expressed his concerns about the arrest of a parliamentary researcher on suspicion of spying for Beijing. The issue was raised during a meeting between Sunak and Chinese Premier Li Qiang at the G-20 summit in India. The Metropolitan Police confirmed that two men, in their 20s and 30s, were arrested in March under the Official Secrets Act.

They have not been charged and have been bailed until October for further inquiries. The Sunday Times reported that the younger man was a parliamentary researcher, working closely with senior lawmakers from the governing Conservatives, including Alicia Kearns and Tom Tugendhat.

The suspect held a pass that grants full access to the Parliament buildings, issued after security vetting. Tensions between the UK and China have been escalating in recent years, with accusations of economic subterfuge, human rights abuses, and Beijing's crackdown on civil liberties in Hong Kong.

The British Conservative party is divided on how to handle the situation, with some calling for a tougher stance against China. However, Sunak has referred to China's growing power as a "challenge" rather than a threat. The UK spy services have also sounded the alarm about Beijing's covert activities.

The head of MI5, Ken McCallum, has warned that the activities of the Chinese Communist Party pose a significant challenge to the UK, while Richard Moore of MI6 has stated that China is their agency's "single most important strategic focus." In January 2022, MI5 issued a rare public alert, accusing London-based lawyer Christine Lee of covertly interfering in UK politics on behalf of the Chinese Communist Party.

The lawyer allegedly acted in coordination with the Chinese ruling party's United Front Work Department, which is known for exerting Chinese influence abroad. Lee denies any wrongdoing, as does the Chinese government. China has repeatedly criticized what it views as British interference in its internal affairs and denies any meddling in the politics of other nations.

Sunak's meeting with Premier Li came shortly after Foreign Secretary James Cleverly's visit to Beijing, the highest-level trip by a British politician to China in recent years. Chinese President Xi Jinping did not participate in the G-20 summit. Sunak defended his approach of cautious engagement, stating that it is better to directly express his concerns rather than criticizing from the sidelines.

The issue of Chinese interference in British democracy is a matter of utmost importance and one that needs to be addressed to safeguard the integrity of the UK's parliamentary system.