I've been watching, the sheer ineptness of the first lot with the tube train design was scary. Got the others recorded for watching, but the snippets I've seen don't hold much hope.
I thought there would be a bit more to the program tbh, just seemed to be lacking in them actually building anything. One weld, and look, it's all done.
Alexandra palace? it might be a little steep but its not a great distance.
If you want to race gokarts Porlock hill would be the ultimate, 1300 ft vertically in 2 miles with hairpin bends. Now that would be a proper race.