It's easy to mess up around Wimbledon and you did well to keep the mistakes down to just one. There were runners out there that know the Common well and still they made too many mistakes.
I actually run well within myself at night as usually this leads to a clean run which will certainly promote you up the results list. It also allows you to take in more of the detail.
Thanks Paul, I think I did execute simplifying the map details for the route most of the time and that helped (TG's favourite technique), but as I noted I got lucky on one leg as well.
In your case, you have the luxurious advantage of having speed to spare! I aim to get there with time but the only way that happens is if I try my limits - right now that is how I approach most events. Yesterday that was the overspeed approach (within my limits of course: what is overspeed for me, must have felt like jogging for you). I am sure it will push the boundaries and hopefully one day I might even be able to compete at the level you do now.