The youngest of Nasima Begum’s four children clutches his mother’s abaya as they queue for their weekly food parcel in a camp in northern Syria. 

At six years old, he has little memory of the comfortable upbringing the family enjoyed in east London – before his father’s decision in 2015 to take the family to Islamic State of Iraq and the Levant’s self-declared caliphate.

Now living off handouts in a makeshift detention centre for the wives and widows of foreign Islamic State fighters, it is not clear whether he or his mother and siblings will ever return. 

Ms Begum, 28, is one of more than 370 women from 46 different countries being held along with their children at Roj camp, the largest of three…