Thats a money scam.
Few days ago, I received an email from HMRC, it was a fake email stating the amount of refund i was entitled to claim for the tax year 2009/10. I also receive emails from HSBC to ask me for my bank account details. I have not account in HSBC.
In addition, i also receive fake emails asking me if i want money trasnfer to my account from the caiman island. This is ridiculous. People should be aware of this money scams going on the emails. There are plenty of them. Best thing file a report to the police for investigation.