IronMike - thanks for the offer, but it's a new bike and I've only ridden it once - I'm not actually sure I can do 10 miles yet! Maybe by the end of the summer! Yes, Richmond Park did sound like the only possibility, but it's a real pain to get to - I'm not confident enough to cycle there, which means a crappy drive through South London, or changing trains twice... and the train journey is scheduled to take almost two hours one way!
Hi Count, how's it going? Which book was that? I've got a couple but they didn't really seem to be road bike routes, so if you've got a book you can recommend, please let me have the title! I have got a car, just no idea on where to go with it!