I've had a look at the training material. It is very clear that where
there is a system problem (e.g. reader is not working, card problems or
there was an emergency evacuation or something else in LU's control)
that card resetting at the ticket office will be permitted. Where
someone is simply not validating because they can't be bothered / forgot
/ whatever (i.e. in their direct control) then that will NOT be dealt
with at the ticket office. Only a call to the Oyster helpline will
suffice.


The faulty (logic-wise) validators on the DLR at Bank and on
Thameslink at London Bridge need fixing, as these both create
unresolved journeys even when used correctly.