We now accept that this story was factually incorrect in that, while the confidential data had indeed been stolen, no such letter was sent.
Correspondence seen by The Inquirer reveals that the stolen briefcase containing data on 13,000 mortgage customers has been recovered unopened and the bank has decided it's not necessary to let customers know that the theft happened and doesn't wish to cause them worry by informing them of the fact that its employees routinely carry detailed listings of customers' financial affairs around with them in an extremely insecure manner.
So that's alright then. ยต
See Also
More bank details stolen