Despite Rhianan being assessed by Prevent after her mother made a referral in September 2020, her case was closed after a criminal investigation began the following month. At that stage her case was deemed to be beyond the remit of the deradicalisation scheme.

The inquest heard after Rhianan was arrested on 22 October 2020, MI5 discussed with the police officer running the investigation whether an “exception” on Prevent could be made for Rhianan, but the detective had said it could not.

Supt Riley said the detective was “following the guidance that was available in 2020”.

Charges against Rhianan were dropped in late December in 2021, after a Home Office unit that deals with modern slavery and trafficking made a formal finding that she was a victim of exploitation.

But the court heard the referral to the Home Office was not made by police after they began investigating Rhianan in autumn 2020.

Rather, the inquest heard it was only made at the instigation of defence lawyers after she was charged in April 2021.

Supt Riley was questioned about whether there had been a missed opportunity for police to make a referral in November 2020, but he said that was not the case.

The inquest heard in 2020, counter-terrorism officers did not receive training about modern slavery referrals, even though the relevant legislation had been in force since 2015.

The inquest continues.

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