Police are texting 70,000 people, warning them that they may have been victims of a banking scam in the UK's biggest anti-fraud operation. The Met have charged a Londoner with running an international service of fake phone calls to victims, who have lost thousands of pounds. Detectives only have victims' phone numbers and are asking people to act if they receive their messages. Police commissioner Sir Mark Rowley said the proactive counter-fraud investigations involved ‘industrialised fraud’. There could be 200,000 UK victims of fraudsters pretending to be a bank and warning of suspicious activity on their accounts. A London address is the centre of fraud on a global scale. Police have the numbers of victims but not their names and addresses. Genuine messages from police were sent on 24 or 25 November, directing victims to register at the Police Action Fraud website. Texts on any other day should be regarded as fraudulent.