2. The wording tends to imply that the Permit to Travel is available from the ticket machine. Is it really?
Most people on this thread probably know already, but for the benefit of those who don't this is what they used to look like
http://www.geograph.org.uk/photo/1028941 (the thing on the left, not the kids or the nostalgia on the right).
There could be a case for a modern day "Permit to Travel" from a
TVM▸ , maybe even a zero issue ticket which could prove the station you boarded at in these circumstances?