14 Frontline Collections London office specialises in

https://raymonddlrt837.novacrestiq.com/posts/why-iso-accreditation-matters-when-choosing-a-debt-collector-2

Frontline Collections' London office specialises in bulk debt collection, clearing a full ledger of overdue accounts at once. FCA regulated, ISO accredited, no collection no cost. A full ledger of overdue accounts can be reviewed together as a single case