Aslam says she came to Syria with her Bengali husband, Shahan Chaudhary, just “to bring aid”, and claims they made a living by “baking cakes”. He is now in al-Sina prison, and they have both been stripped of their citizenships.

The mother-of-four denies joining IS but admits bringing her children to its territory, where her eldest daughter was killed by an explosion.

“I lost her in Baghouz. It was an RPG [rocket-propelled grenade] or a small bomb. She broke her leg, and she was pierced with shrapnel from her back. She died in my arms,” she says, in a low voice.

She told me her children had developed health problems in the camp, including her youngest, who is eight. But she admits turning down an offer for them to be returned to the UK. She says they didn’t want to go without her.

“Unfortunately, my children have pretty much grown up just in the camp,” she said. “They don’t know a world outside. Two of my children were born in Syria, they have never seen Britain, and going to family who again they don’t know, it would be very difficult. No mother should have to make the choice of being separated from her children.”

But I put it to her that she had made other choices like coming to the caliphate where IS was killing civilians, raping and enslaving Yazidi women, and throwing people from buildings.

“I wasn’t aware of the Yazidi thing at the time,” she said, “or that people were being thrown from buildings. We did not witness any of that. We knew they were very extreme.”

She said she was at risk inside the camp because it is known that she would like to go back to Britain.

“I have already been targeted as an apostate, and that’s in my community. My kids have had rocks thrown at them at school.”

I asked if she would like to see a return of an IS caliphate.

“Sometimes things are distorted,” she said. “I don’t’ believe what we saw was a true representation, Islamically speaking.”

After an hour-long interview, she returned to her tent, with no indication that she would ever leave the camp.

The camp manager, Hekmiya Ibrahim, says there are nine British families in Roj – among them 12 children. And, she adds, 75% of those in the camp still cling to the ideology of IS.

There are worse places than Roj.

The atmosphere is far more tense in al-Hol – a more radicalised camp where about 6,000 foreigners are being held.

We were given an armed escort to enter their section of the camp.

As we walked in – carefully – the sound of banging echoed through the area. Guards said it was a signal that outsiders had arrived and warned us we might be attacked.