(BBC) Shamima Begum has lost her challenge over the decision to deprive her of British citizenship despite a “credible” case she was trafficked.
Mr Justice Jay told the semi-secret court dealing with her case that her appeal had been fully dismissed.
The ruling means the 23-year-old remains barred from returning to the UK and stuck in a camp in northern Syria.
Her legal team said the case was “nowhere near over” and the decision will be challenged.
Ms Begum was 15 years old when she travelled to join the self-styled Islamic State group in 2015.