Yesterday, the chancellor of the exchequer, Alistair Darling, made a statement to Parliament that HM Revenue and Customs (HMRC) had lost two data discs containing the personal details of 25 million UK citizens, including in many cases their banking details.The data is the complete database of all UK families with children, and includes names, addresses, dates of birth and the details of 7.25 million bank accounts. The head of HMRC, Paul Gray, has resigned.