www.theguardian.com/society/2019/jan/02/women-forced-into-marriage-overseas-asked-to-repay-cost-of-return-to-uk
Women who escape forced marriage are forced to hand over their passports until they have repaid the loan.
''Four young British women imprisoned and tortured at a “correctional” religious school in Somalia ahead of expected forced marriages told the Times they each had to pay £740 to return home, where the burden of the loans...contributed towards them becoming destitute.''
The original report is in the times but behind a paywall and I don't have a share token.