Tour de France winner Bradley Wiggins has spent the morning in training at Box Hill in Surrey.
He was joined by Olympic Gold hopeful Mark Cavendish and GB team mates for several laps of the climb in the Surrey heat.
Mark Cavendish will lead Britain's charge for road race victory on Saturday before Wiggins goes for gold in the time trial on Wednesday.
Riders from nations including Australia, France, Austria, Canada, Belgium and China also trained on Box Hill, which is set to be key to the outcome of the race.
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Friday afternoon's forecast for the east of the region
Friday afternoon's forecast for the west of the region