François Hollande, the French president, will follow the last part of the stage in race director, Christian Prudhomme's car. Before his election to president, Hollande used to represent one of the constituencies of Corrèze.
Update: 13.30 BST
Looks as though my guess has proved wrong. Although a breakaway of 16 has got around 2.30 mins, the peloton is active and unwilling to let them get a big lead.