In message , Kat
writes
The ticket is correct in terms of zone validity, anyone know what a "Code 70
" is ?

Unspecified Oystercard Processing Error/Unspecified Card Presentation
Error.
Make sure you place your card flat on the reader and don't slide it around.
I've noticed that 70 and 94 sometimes come up if the card is either hovered
over or moved about on the reader.

Wasn't the original plan for Oysters a card that you could just wave in
the air somewhere in the general vicinity of a reader - in order to
speed up passage through the gates - instead of "Make sure you place
your card flat on the reader and don't slide it around" ?

--
Bob Adams (email to )