Crowds gather along the route.
Hundreds of thousands of people expected to watch stage three of the race.
Sprint finish line in High Street, Epping.
Route into central London includes Loughton, Buckhurst Hill, Woodford Green, South Woodford, Walthamstow, Leyton and Leytonstone.
Ongar's Mark Cavendish ruled out of tour with shoulder injury.
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