Below is a list of all GB station names and their 3 letter alpha codes. These codes can be used with the TrainTracker™ Text service as well as the Journey Planner, Live Departure Boards and Station Information services.
Please note: The station names are listed by their official names e.g. if you're looking for "Waterloo", you'll find this under "L" for "London Waterloo".
The list of station codes can be downloaded from here.