Deprivation of British citizenship and withdrawal of passports

The Home Secretary has the power to take away a person’s British citizenship if they consider it conducive to the public good, or if the person obtained their citizenship by fraud. The power of citizenship deprivation is in section 40 of the British Nationality Act 1981.

Citizenship deprivation usually happens for national security reasons or in cases of fraud

Depriving someone of their British citizenship for the public good is generally used in the context of national security or counter-terrorism. The aim is to prevent a person who poses a threat to the United Kingdom from returning to the country, which they would otherwise have a right to do as a British citizen. There are also rare cases involving serious or organised criminals.

People can also be stripped of their citizenship if the Home Secretary is satisfied that they obtained it by fraud, false representation or concealment of a material fact (such as seeking asylum under a fake identity).

For people who have naturalised as British, citizenship deprivation is permitted even if it would leave them stateless (that is, without the citizenship of any country). Someone who was born British and has no other nationality cannot be deprived of their citizenship in any circumstances.

People have a right of appeal, although intelligence evidence may be withheld

The Home Secretary is usually required to give the person written notice. Notice can be withheld in certain circumstances, such as where it is considered reasonably necessary in the interests of national security.

There is a right of appeal against citizenship deprivation. Appeals take place at the First-tier Tribunal or (in national security/terrorism cases) the Special Immigration Appeals Commission, SIAC. In SIAC appeals, sensitive evidence may be withheld from the appellant and their lawyer, and a ‘special advocate’ appointed to represent their interests instead.

The Supreme Court has given multiple judgments on how judges are required to handle appeals, most recently in the December 2025 case of Kolicaj.

Over 1,500 citizenship deprivation orders were made from 2010 to 2024

There have been at least 1,342 deprivation orders for fraud, and 223 orders for the ‘public good’, since 2010. The exact number of successful appeals against these orders is not known.

Commentators examining known ‘public good’ cases have suggested that many of those affected are Muslims with South Asian, Middle Eastern or North African birth or ancestry, some born in the UK. By contrast, most fraud cases involve naturalised Albanians.

Deprivation now affects people born in the UK, not just naturalised citizens

Deprivation of citizenship for fraud was introduced over 100 years ago, by legislation passed in 1914. A power to deprive citizenship for certain types of misconduct, including if a naturalised citizen had proven “disaffected or disloyal”, was added shortly before the end of the First World War. Until 2003, however, deprivation was only possible for naturalised citizens.

The Nationality, Immigration and Asylum Act 2002 extended citizenship deprivation to British-born dual nationals for the first time. This was possible if they had done something “seriously prejudicial” to the UK’s vital interests, but the test was later changed to “conducive to the public good”.

British citizens can also be refused a passport or have their passport withdrawn

British passports are issued at the discretion of the Home Secretary under the royal prerogative (an executive power which does not require legislation). They can be withdrawn or withheld using the same discretionary power.

Withdrawal of passports is not the same as withdrawing citizenship. Someone whose passport is withdrawn remains a British citizen but their overseas travel is restricted. Home Office policy states this will be done “sparingly”, such as where the person intends to travel abroad to engage in terrorism.

There is no right of appeal against having a passport withdrawn, but the person can ask for an internal review by the government or apply for judicial review by a judge. From 2013 to 2024, there were 100 cases of passport withdrawal for national security reasons, according to the Home Office.