Ms Begum was born and brought up in the UK, and was a British citizen at birth. When she was 15 years old, she travelled to Syria with two friends. Shortly after she arrived, she married an ISIL fighter. Ms Begum has remained in Syria since 2015 and has aligned with ISIL. She is currently detained in the Al-Roj camp run by the Syrian Democratic Forces, where conditions are poor. Ms Begum now wishes to return to the UK.
On 19 February 2019, the Secretary of State for the Home Department decided to deprive Ms Begum of her British citizenship, on the basis that Ms Begum's return would present a risk to national security. Ms Begum sought leave to enter the UK so that she could pursue an appeal against this decision, but her application for leave to enter was refused. Ms Begum challenges both the decision to deprive her of citizenship and the decision to refuse her leave to enter the UK.
The Special Immigration Appeals Commission found that, while Ms Begum remains detained by the Syrian Democratic Forces in a camp, she cannot give effective instructions or take any meaningful part in her appeal. This means that her appeal cannot be fair and effective. The Court of Appeal therefore held that Ms Begum should be granted leave to enter the UK so that she could pursue her appeal. The Secretary of State appeals to the Supreme Court.

Ms Begum was born and brought up in the UK, and was a British citizen at birth. When she was 15 years old, she travelled to Syria with two friends. Shortly after she arrived, she married an ISIL fighter. Ms Begum has remained in Syria since 2015 and has aligned with ISIL. She is currently detained in the Al-Roj camp run by the Syrian Democratic Forces, where conditions are poor. Ms Begum now wishes to return to the UK.
On 19 February 2019, the Secretary of State for the Home Department decided to deprive Ms Begum of her British citizenship, on the basis that Ms Begum's return would present a risk to national security. Ms Begum sought leave to enter the UK so that she could pursue an appeal against this decision, but her application for leave to enter was refused. Ms Begum challenges both the decision to deprive her of citizenship and the decision to refuse her leave to enter the UK.
The Special Immigration Appeals Commission found that, while Ms Begum remains detained by the Syrian Democratic Forces in a camp, she cannot give effective instructions or take any meaningful part in her appeal. This means that her appeal cannot be fair and effective. The Court of Appeal therefore held that Ms Begum should be granted leave to enter the UK so that she could pursue her appeal. The Secretary of State appeals to the Supreme Court.