A loan shark, or illegal money lender, is someone who lends money and asks for repayments, but who does not have the necessary authorisation from the Financial Conduct Authority (FCA). They do not follow the rules and regulations that the FCA has in place to protect borrowers.
Loan sharks can crop up in any section of society and target people from all walks of life and there are many organisations who might come across someone who is showing signs of being in debt to an illegal lender.