abstract:The tort of breach of confidence, is a common law tort that protects private information that is conveyed in confidence. A claim for breach of confidence typically requires the information to be of a confidential nature, which was communicated in confidence, and was disclosed to the detriment of the claimant.
And they could not understand "why grouping of payments in bands for one, but not the other, presents data-protection or breach-of-confidence issues", as the BBC had insisted.