Curve did not work at vauxhall bridge or Banbury Station and at a Sainsbury petrol station
You need to email email@example.com to get an answer to why it is not working for you. It worked for me on national rail at kings cross.
Given there are numerous Train Operating Companies (TOCs) and types of machines, and given National Rail don’t actually run any trains, it’s unlikely to be systems issue for National Rail. Also given it didn’t work in Sainsbury’s, it may be more likely to be an underlying card issue
Thank you but worked perfectly well in other shops and the pub. Perhaps I await my new card