I hear a lot about this type of ticket on this forum, could someone please explain how it works and if I am Able to obtain one from a Chiltern Railways TVM if the machine won’t sell tickets and the booking office is closed? Are they available from other TOC’s TVM’s? With the imminent closure of the ticket offices and the frequent failure of the TVM’s I am well aware that one day soon I will be unable to purchase a ticket on demand for my journey and therefore have to board the train without a ticket and potentially face an argument about how the TVM is working, even when it wasn’t with a ticket inspector, gate line staff etc. Thanks.