sucotash said:Because we had twice the number of Brittish riders...
Because the whole race was flat and there was no risk of dropping Cav so the tempo was high the whole race, and nobody had a chance to significantly ride away. Now on the circuit around Box Hill the Brits can not control it like that, because they would drop Cav
I do not think it is hard enough to drop Cav, but rather at most it can be used as a launchpad for attacks (see Gilbert comments)
And anyway after the circuit there still happens to be 50km of flat which they can use to reel in the break.
Currently Froome and Wiggins seem to be the two strongest riders in the peloton and them giving their all to bring back a break with a time gap which will certainly not be substantial is certainly a possibility, though not guaranteed.