Updated September 28, 2026
What is Prudential Regulation Authority?
In short
The Prudential Regulation Authority is the UK body that authorises and supervises banks and other large financial firms, and its reference numbers tell you a firm has cleared that process.
The Prudential Regulation Authority is the UK regulator that authorises and supervises banks and other large financial firms. A reference number here means a firm has been through that authorisation process, so the business handling your money is watched by an official body. HSBC UK is listed as 765112, Kroo as 953772 and Monzo Flex as 730427. Bank of Ireland and Metro Bank are the other UK names in this group.
Sources
- kroo.com, checked September 26, 2026
- monzo.com, checked September 26, 2026
- hsbc.co.uk, checked September 26, 2026