We're not going to get a team together for the cyclocross champs, so I am planning to do a quick mtb training ride on Sunday. How fast it is might depend on whether I do Hillingdon or the clubrun tomorrow (though it is debatable which is the hardest ...).
Idea would be to met at East Croydon station at 10am and head of to the Wall of Death on a non-stop loop which is about 40-45km mostly off-road and take 2-2h30 so back for late lunch. It should be dry and nice weather.
I will confirm here tomorrow though, in the meantime if you are interested please post here.