Parliament researcher among two arrested amid China spy claims
Police confirmed two arrests under the Official Secrets Act as Rishi Sunak raised concerns about Chinese interference with Premier Li Qiang.

What happened
A UK parliamentary researcher was among two men arrested in Britain in March 2023 under the Official Secrets Act amid allegations of spying for China, BBC News reported on 10 September.
The Metropolitan Police confirmed that officers arrested a man in his 20s in Edinburgh and a man in his 30s in Oxfordshire. BBC sources identified one of those detained as a researcher working on international affairs in Parliament.
Officers searched both homes and another property in east London. The men were taken to a police station in south London before being released on bail until early October.
The investigation was being handled by the Met's Counter Terrorism Command, whose responsibilities include suspected espionage offences. The BBC report did not identify either man or report any charges; the allegations had not been established in court.
The Sunday Times, which first disclosed the researcher's arrest, reported that he had access to several Conservative MPs, including Tom Tugendhat and Alicia Kearns. At the time of the BBC report, Tugendhat was security minister and Kearns chaired the Commons foreign affairs committee.
According to the reporting, the researcher's access to Tugendhat predated his appointment as security minister in September 2022. Their contact was described as limited, with no dealings after Tugendhat took up the ministerial role. The Sunday Times also reported that the researcher had previously lived in China.
On 10 September, Downing Street said Prime Minister Rishi Sunak had raised concerns about Chinese interference in British parliamentary democracy with Chinese Premier Li Qiang. Their meeting took place during the G20 summit in India.
The background
The arrests followed earlier warnings about attempts to influence British politics. In 2022, MI5 issued an alert alleging that Christine Lee had undertaken political interference on China's behalf, including providing donations to support MPs' work. That was a separate matter from the researcher's arrest.
In July 2023, Parliament's Intelligence and Security Committee published a report criticising the government's response to security risks associated with China. It described efforts to influence officials and public bodies at different levels of government.
The legal framework was also changing. According to the BBC, new national security legislation providing additional investigative powers took effect during summer 2023, after the March arrests. The two men had therefore been arrested under the older Official Secrets Act.
The BBC reported that MI5 and other intelligence agencies had long regarded that older legislation as insufficient for tackling hostile state activity. The committee's July report also highlighted difficulties with prosecutions, noting that acting as an agent of a foreign intelligence service was not, at that time, itself a criminal offence.
Separate Insider Threat Roundup coverage of a Royal Navy sailor charged over an alleged attempt to spy for Russia concerns proceedings under the National Security Act. It provides a comparison with the newer legal framework, rather than evidence about the parliamentary investigation.
The diplomatic backdrop was more complicated than a single security investigation. London and Washington had been seeking to stabilise relations with Beijing, and Foreign Secretary James Cleverly visited China less than two weeks before the arrests became public.
The BBC also noted allegations of Chinese espionage or political interference in Australia and Canada. China had denied such activity. Those wider denials should not be read as a response to the specific allegations involving the parliamentary researcher.
What people are saying
Kearns said she knew about the Sunday Times report but would not discuss it. She stressed the need to avoid undermining the authorities' work despite public interest in the allegations.
Justice Secretary Alex Chalk told the BBC's Sunday with Laura Kuenssberg programme that he could not address individual cases. He defended continued engagement with China while emphasising the caution Sunak had urged. In a separate Sky News interview, he said he expected parliamentary authorities to learn any necessary lessons.
Conservative MP Iain Duncan Smith argued that the allegations demonstrated a growing threat from the Chinese Communist Party under President Xi Jinping. He also challenged the government's approach to Beijing and criticised Cleverly's visit.
Another Conservative MP, Tim Loughton, said parliamentary security might have been compromised. He argued that the Chinese Communist Party should be treated as a hostile foreign threat.
Cleverly had previously told the BBC during his Beijing visit that cutting off engagement with China was not a credible policy.
What happens next
At the point covered by the BBC's 10 September report, the next stated procedural milestone was the expiry of the men's police bail in early October. The report gave no charging decision or date for the investigation to conclude.
Important questions remained unanswered publicly, including what information might have been involved and whether any material had been passed to another party. Reported contact with MPs did not, on its own, establish access to classified information.
For parliamentary authorities, any assessment of access arrangements would need to remain distinct from the criminal investigation. Chalk's expectation that lessons would be learned was not an announcement of a completed review, a finding of a security failure or a specific change to safeguards.
Timeline
2022
MI5 issued a separate alert alleging that Christine Lee had undertaken political interference on China's behalf.
March 2023
Police arrested two men under the Official Secrets Act in Edinburgh and Oxfordshire.
July 2023
Parliament's Intelligence and Security Committee published warnings about the government's response to security risks from China.
10 September 2023
BBC News reported the researcher's arrest; Downing Street said Sunak had raised interference concerns with Li Qiang.
Why this matters
The allegations highlight an insider-risk question for organisations handling sensitive work: how to manage access provided through trusted professional relationships. The reporting did not establish that classified information was obtained or disclosed, so it cannot support conclusions about a particular control failure. Organisations can nevertheless distinguish between access to influential people and access to protected material, review permissions proportionately, and ensure that internal assessments do not prejudice police inquiries or treat allegations as proof.
Questions and answers
- why was a UK Parliament researcher arrested?
- BBC News reported that a parliamentary researcher was arrested under the Official Secrets Act amid allegations of spying for China. Its 10 September 2023 report did not describe charges or establish that the allegations were proven.
- when were the two men arrested?
- The Metropolitan Police said the arrests took place in March 2023. One man was arrested in Edinburgh and the other in Oxfordshire.
- was the parliamentary researcher named?
- The researcher was not named in the BBC's 10 September 2023 report. BBC sources described him as working on international affairs.
- which MPs did the researcher reportedly have access to?
- The Sunday Times reported access to Tom Tugendhat and Alicia Kearns, among others. The reported contact with Tugendhat predated his appointment as security minister, with no dealings in his ministerial capacity.
- who was investigating the China spy allegations?
- The Metropolitan Police's Counter Terrorism Command was investigating. Its remit includes espionage-related offences as well as counter-terrorism work.
- were the arrested men still in custody?
- According to the BBC's September 2023 report, both men had been released on police bail until early October after being taken to a south London police station.
- what did Rishi Sunak say to China about the allegations?
- Downing Street said Sunak raised concerns about Chinese interference in British parliamentary democracy with Premier Li Qiang during their meeting at the G20 summit in India.
Sources
This report is based on original reporting and publications from:

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