We will be visiting the UK this summer and are somewhat unfamiliar with train fares, so thank you in advance for your advice. We want to leave Southampton the morning of July 13, traveling to Tywyn. In checking the National Rail journey planner, the through fare for all of the morning departures is 92 pounds but if we buy separate tickets Southampton to Birmingham (31) and Birmingham to Tywyn (17), it's quite a bit chaper. Is there any reason not to do this? Also, we will pre-pay for the tickets online; if we collect them from the machine at Southampton, will it recognize an American credit card (which has only a magnetic strip, not chip-and-pin)? And can we collect the Birmingham-Tywyn tickets at Southampton, or do we need to do that while changing trains in Birmingham? Thanks again.