Question to the Home Office:

To ask the Secretary of State for the Home Department, what estimate she has made of the number of UK citizens or residents who have fought alongside ISIS; and how many have now returned to the UK.

Approximately 850 UK linked individuals of national security concern have travelled to engage with the Syrian conflict. We estimate that just under half have returned. This number includes all those of national security concern, not just those affiliated with Daesh. Everyone who returns from taking part in the conflict in Syria or Iraq must expect to be investigated by the police to determine if they have committed criminal offences, and to ensure that they do not pose a threat to our national security.