Often, I have to travel to stations just outside the oyster card zone (literally one or two stops beyond the limit). The difference in fare between the final oyster card station and the next non-oyster station from central London can be huge. Is there any way I can travel the bulk of my journey on the oyster fare up to the final oyster station and then just the remainder on a regular ticket?
If the oyster card reader is on the platform, and I position myself in the right part of the train, I could dart out and tap out on my oyster card. However, I then do not have time to buy a ticket for the remainder of my journey. It's also risky (might not get back on the train in time), looks dodgy and requires preplanning. I guess I could somehow buy a ticket ahead of time for just the tiny stretch I need? Is it possible to do that from a ticket machine in central London?
Or, is there someway to get a discounted ticket to the final station due to the fact I have an oyster card and therefore could travel the bulk of the journey on oyster card?