UK Strips Citizenship of Former Police Officer Over Russian Links in Landmark Case
In an unprecedented move, the British government has stripped a former police officer of his UK citizenship, marking the first time a British national has lost their citizenship on national security grounds specifically due to links with Russia. The decision, made by Home Secretary Shabana Mahmood, underscores a tightening of security protocols regarding foreign state influence.
- Who: Mark Bullen, 45, a former officer with the Hertfordshire Constabulary.
- What: Deprivation of British citizenship and revocation of his passport.
- Why: National security concerns related to his ties to the Russian state.
- Precedent: The first British citizen stripped of nationality over Russia-specific links.
The Road to Deprivation: From Hertfordshire to St Petersburg
Mark Bullen, originally from Bracknell in Berkshire, spent more than a decade working for the Hertfordshire Constabulary. However, his professional life in the UK was contrasted by a lifelong obsession with the Soviet Union and Russia, a passion he admitted led friends and family to call him a “spy” during his childhood.
Bullen’s ties to Russia deepened during his time as a police officer when he participated in a month-long exchange program in St Petersburg, where he met with senior Russian officials. This fascination eventually led him to relocate to Russia, where he has lived for nearly twelve years. In 2022, he achieved what he described as a “lifelong dream” by obtaining Russian citizenship.
Current Role in Russia
Bullen currently resides in St Petersburg and works in communications for Zenit St Petersburg, a prominent football team owned by the Russian energy giant Gazprom. He is married to a Russian national and has four children.
The Turning Point: Luton Airport Detention
The escalation of official scrutiny began in November 2024. Upon arriving at Luton Airport from Turkey, Bullen was stopped by counterterrorism officers. He was detained under Schedule 3 of the Counterterrorism and Border Security Act 2019, and his electronic devices were seized for examination.
According to reports, Bullen was questioned during a four-hour interview regarding the 2018 Salisbury poisonings. The Metropolitan Police, which manages cases involving hostile state activity, confirmed the detention was part of ongoing investigations into potential foreign state activity to protect national security.
The Home Office Decision
In October 2025, just one month after taking office, Home Secretary Shabana Mahmood revoked Bullen’s British citizenship. The Home Office stated that the move was “conductive to the public good.”
Even as citizenship deprivation is typically reserved for terrorists or dangerous gangsters, Ms. Mahmood justified this specific action on the grounds of national security. The Home Secretary further stated that the specific evidence supporting the decision “should not be made public in the interests of national security.”
Bullen’s Response
Mark Bullen has denied any wrongdoing and has described the UK government’s actions as “comical,” arguing that he is not a threat to the United Kingdom. He expressed disbelief that a country centered on “freedom and liberty” would behave in such a manner.
Frequently Asked Questions
Why is this case considered a “landmark”?
It is the first time the UK has stripped a citizen of their nationality specifically based on national security concerns linked to Russia, moving beyond the traditional application of these powers against terrorists.
What is the legal basis for the airport detention?
Bullen was detained under Schedule 3 of the Counterterrorism and Border Security Act 2019, which allows authorities to seize electronic devices to prevent terrorism or protect national security.
Does Bullen still have a passport?
His British passport has been revoked, but he holds Russian citizenship, which he obtained in 2022.
Looking Ahead
This case signals a more aggressive stance by the UK government in managing individuals with dual loyalties or deep ties to states deemed hostile. As geopolitical tensions persist, the use of citizenship deprivation as a tool for national security may see further scrutiny and application.