The length of the stage and the fact that everyone has the same goal (to be first over the line - which is different to multi-stage races), usually leads to a thinning out of the peleton and splintering into groups. Team GB did a great job of marshalling this all day. Leaving the first group out there as long as they did was perfect, then when people tried their chances later on they still had enough energy/men to keep them in sight.
Beforehand team gb were saying they wanted to get to the last corner with one man left in front of cav. They did this perfectly with Geraint. And they'd kept Cav out of the wind all day until that point.
Then there was some barging off line which was pretty much every sprinter's race tactic which mean that a man got between Geraint and Cav. But Cav being the cunning devil he is didn't panic and managed to sit tight on a good wheel until a gap opened up.
If that gap hadn't opened up on the right, it would have been much harder, but Cav did his usual job of gaining momentum very quickly and getting a gap on anyone on his wheel.
Then it was a matter of hanging on for 50m further than the initial plan - you could see everyone coming up on him and my heart was well and truly in my mouth as he crossed the line.
The brilliance of it was that everybody in the peleton knew exactly what GB were going to do and how they were going to do it, but still they couldn't stop it.