Ah, I see you're doing the same thing I am. Well, the answer is "yes". You have to download the mainline maps for the south east. And the answer to your next question is Milton Keynes, Reading, High Wycombe and Maidstone. But, I cannot provide an answer to your third question, which is "but all those areas are grim so where else should I consider living". If you find an answer to that one, or if you have any thoughts on it, please let me know. Becuase that's the one I'm stuck on, too.