The City watchdog has confirmed it does not yet know whether thousands of UK customers' money is safe after the spectacular collapse of German payments company Wirecard.
Customers of a host of UK fintech firms, including card providers Curve and Pockit, use Wirecard's technology to process payments.
The Financial Conduct Authority (FCA), ordered Wirecard's UK arm to stop making payments on Friday to prevent it potentially disposing of any funds after it emerged that €1.9bn was missing from the company's accounts.