From Action Fraud:
People are reminded to be cautious when answering the phone to cold callers. This follows a high value scam on 22-23 November.
Unknown offenders purporting to be from Scotland Yard called victim on landline stating there had been fraudulent activity on their bank card and were going to block it. They then asked the victim on two occasions to withdraw large amounts of cash and read the serial numbers over the phone, they stated the notes were counterfeit/fraudulent and sent a courier to collect them.
People are again reminded not to disclose any personal information tell them you will go to your branch and check in person, do not ring the bank as the caller/scammer could still be on the other end.
Report the call to Action Fraud on 0300 123 2040 or via actionfraud.police.uk