Kt1974: No press release. You ought to query with your bank why their systems are over-sensitive towards TfL transactions.
Adam: Cheshunt fares appear to be frozen. This is probably because GA are compensated for charging TfL fares over that line. Fares for Watford Junction will be increased in line with National policy, as will fares to stations beyond West Drayton and to Shenfield.
I hope the single fare finder does get updated soon, though I fear that the DfT have told TfL not to do so.