TfL accepts Scottish banknotes, and I've also used them at machines in England (not sure which TOCs). I would have thought all machines take them actually. Not sure about NI since the rail system is separate from GB. But supermarket self-checkouts in England take NI notes.
Accepting £100 banknotes would deplete machines of change quickly. Although I did come across a machine in Italy that said it would accept a €500 banknote for a €5 ticket. Even in cash-loving Germany machines will only accept €50s when your ticket is expensive enough.
It "should" be possible in all circumstances as long as you haven't exceeded the validity of the cheaper ticket. Or they could extend the Promise to Pay idea (similar to Japan where as I understand it, in many networks you can just buy any ticket to get in the barriers and adjust it when you leave the system) but in the UK they seem more interested in catching people out than providing good service.
Accepting £100 banknotes would deplete machines of change quickly. Although I did come across a machine in Italy that said it would accept a €500 banknote for a €5 ticket. Even in cash-loving Germany machines will only accept €50s when your ticket is expensive enough.
This is no longer an entitlement, but should be possible if the station en-route is run by the same TOC as the TVM. I have had that done by both WMT and SWR - the original was "non issued" and a replacement issued which covered what I'd done so far and what I wanted to do.
Only possible at a booking office, though.
It "should" be possible in all circumstances as long as you haven't exceeded the validity of the cheaper ticket. Or they could extend the Promise to Pay idea (similar to Japan where as I understand it, in many networks you can just buy any ticket to get in the barriers and adjust it when you leave the system) but in the UK they seem more interested in catching people out than providing good service.
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