This may seem like a stupid question, but for the last couple of weeks traveling on TPE I have often looked at the tiny section that is First Class. Not many seats. Do people know how many 1st class tickets they sell. For example if the 10 or so seats were sold online via the TPE website in advanced would Manchester Piccadilly know this - as lets say Mr and Mrs Smith walked up to buy a on the day a 1st class to York - would they be sold it or would the system refuse (I understand that the Smiths would be buying a Anytime or off peak so not tied in to one service) but if they then boarded the train that already had a full 1st class what would happen. Would the ticket machine flag up that there were no 1st class tickets left for XXXX service or would the agent and system just blindly sell and not inform the customer that there was no room in 1st class on XXXX.