Does Ride London attract the super pro elite because these times that are being talked about are very impressive! I've only done one 100 mile sportive and we finished with a moving time of just under 6 1/2 hours and we easily passed others vs being passed at a rate of 10 to 1.
I must admit that even a very spread out sportive (helped by us starting 20 minutes late due to an exploding tyre in our group!) got my bum twitching as someone who only rides solo. Random swerving seemed to be the order of the day and I probably looked like a try hard idiot when I overtook some people out of the saddle giving it some beans but there were people who literally were all over the road and whom a call of "on your right" caused them to instantly weave right while looking over their left shoulder

I wanted to be alongside them for as little time as possible