The Swiss, Belgians, Spanish and Italians will have an interest in getting a breakaway going, Team GB might have allies in the USA, Germany and Norway in chasing down the breaks.
If a late breakaway survives, it's a toss-up between LLS or Cancellara - unless Sagan is with them...
If it's a bunch sprint, Cav, Greipel and Sagan, order unknown. And LLS will cause a crash when he slams on the brakes in disgust after Wiggo leads out the peloton past him at 1km to go.