I recently traveled to Carlisle on the 4th of April from London. There was engineering works on at Euston so I went to Kings Cross. Was in a rush (and wasn't expecting a 5h30 train ride) so I ended up buying a via Newcastle route on the TVM. Would any permitted be valid (which is considerably cheaper) and if so, would VTEC refund? I have emailed their customer relations but be interested to hear peoples views here.