Shamima Begum still a national security threat, UK supreme court told

MI5 assessments read out at start of appeal over revoking of Isis recruit's citizenship

Shamima Begum, who left Britain as a schoolgirl to join Islamic State in Syria, remains a serious threat to national security and should be deprived of her UK citizenship, the supreme court has been told.

Extracts of MI5 assessments of the dangers posed by the return of those who joined Isis were read out on Monday at the start of a two-day hearing challenging the decision to revoke Begum's citizenship and refuse her leave to enter the UK.