it will be a shame that the southern most section of the river Lee series will be out of commission for the duration of the games. Like Dorsetgal, I will not be setting up any challenges. Although I can understand Groundspeaks decision regarding the security concerns around certain venues I think the measures go too far as half of the London caches are likely to be disabled being within 1mile of an olympic route. Members of the public will still be allowed to walk where these caches are placed.