Customers’ insurance policies are among the data sold to brokers for investment scams - according to reports

Barclays Bank is investigating claims that details from thousands of customers’ accounts, including insurance policies, were stolen and sold to rogue traders.

The information, which also included customers’ earnings, savings, mortgages and health issues, is worth millions on the black market because it allowed unsuspecting individuals to be targeted in investment scams, according to reports in the Mail on Sunday.

Additionally, the information was reportedly used to sell victims rare metals that did not exist.

The data leak was exposed by an anonymous source who passed the newspaper a memory stick containing files on 2,000 of the bank’s customers.

He claimed it was a sample from a stolen database of up to 27,000 files that he said could be sold by “shady” salesmen for up to £50 per file.