According to this piece, IT Compliance Institute - UK banks don't bother to report online fraud, police complain, UK banks are not reporting online fraud to the authorities.

Although the article goes on to include an admission by the police that probably nothing could be done even if the banks reported the issues, the approach seems to lack the care of attention you would expect from companies that deal with billions of pounds of customer money. I'd rather the issue was reported and the police decided to ignore it, than have the banks decide the reporting is unimportant.