Shamima Begum, the Bethnal Green schoolgirl, served in the Islamic State’s “morality police” and also tried to recruit other young women to join the jihadist group, well-placed sources have told The Telegraph.

She was allowed to carry a Kalashnikov rifle and earned a reputation as a strict “enforcer” of Isil’s laws, such as dress codes for women, sources claimed.

The claims are at odds with Miss Begum’s own account of her four years with the group, which she joined at the age of just 15.

Miss Begum, now aged 19, has insisted she was never involved in Isil’s brutality but spent her time in Syria as a devoted housewife to a jihadist fighter.

Miss Begum, whose discovery in a refugee camp in northern Syria in February sparked a public outcry, said she concentrated on bringing up the couple's children. They subsequently died of malnutrition.

Her husband, Dutch fighter Yago Riedijk, offered a similar story, saying Miss Begum “sat in the house” and that she would pose no danger to the British public if allowed back to the UK.