London, Feb 09 - A report has said that Britain's biggest bank, HSBC, helped its customers evade millions of pounds in tax.

The report was based on details of thousands of accounts from HSBC's private bank in Switzerland, which were leaked by a whistleblower in 2007, reported the BBC.

They showed that bankers helped its customers dodge tax and offered them deals to help them stay ahead of the law.

While admitting that some bank account holders took advantage of bank secrecy to hold undeclared accounts, HSBC said that it has now "fundamentally changed."

The documents, leaked by a computer expert working for HSBC in Geneva in 2007, contained details of about 100,000 clients worldwide. (ANI)