I got boxed in twice with nowhere to go, slower riders in front, left and right of me, was irritating for a few seconds as my rhythm got disrupted.
Had to laugh on Leith hill with riders on the right trying to spin up shouting "keep left" and the riders on the left shouting "what does it look like we are doing, ya farking bobber, There's no room". I got about 3/4 way up then pulled my foot out the cleat as i came to a stop due to the congestion so ended up walking.
Highlight of my day was a rider shouting "first bike of the day I have seen with guards, can I take your wheel?" Duly obliged we powered along for a few miles.
My garmin said 99 miles, I think it was because the GPS lost signal for a few hundred yards about mile 78.