Postpublished at 16:08 British Summer Time 15 July 2017
Thomas Voeckler is second, then about a minute behind him comes the peloton.
The other three? Swallowed up
Chris Froome regains yellow jersey from Fabio Aru
Aru caught out at end of stage
Froome has lead of 19 seconds
Michael Matthews wins uphill sprint to win stage 14
Thomas Voeckler is second, then about a minute behind him comes the peloton.
The other three? Swallowed up
The five-man breakaway has splintered. Thomas de Gendt is out on his own with a lead of a minute. There is about 28km to go.
Rob Hayles
Former GB cyclist at the Tour de France
Answering Andy at 15:55 BST - has Froome won because of the strength of Team Sky?
You cannot be bored of Chris Froome? The way that he races, he takes it by the scruff of the neck.
Would the others win if they had the strength of Team Sky? Quite possibly.
The budget helps and the strength of your team but there are no lucky winners of a three-week stage race.
Spectators are getting comfortable as the race heats up. What a sensational way to spend your Saturday afternoon.
Thomas de Gendt has now been involved in 566kms of breakaways at the Tour this year, taking him past Frederik Backaert as the lead breakaway rider.
Marcel Kittel, who is having a difficult day, had just about caught up with the main group when they hit the bottom of the category three climb.
Then he started to lose touch again. Tough.
The lead group are on the category three Cote de Centres. Timo Roosen had to catch up with the leading four riders after his mechanical and is sliding off again.
Thomas de Gendt and Tommy Voeckler will be first over the top - here we go, slight sprint and it is De Gendt who has the legs.
#bbccycling
Has Froome won 3 tours because of the strength of team sky? Surely Aru, Bardet, Contador and a couple of others would be favourite if they had that team riding for them? Love the tour, bored of team sky.
Andy
Answering Geoff Kidd at 15:44 BST.
Basically it is because the sprinters are generally heavier and they completely load up with lactic acid as soon as they go uphill.
The soak up lactic acid to a certain extent and just sort of deal with it on the flat - but as soon as the road goes up they completely flood and have nowhere to go, they cannot soak it up.
It is all about power to weight ratios.
Michael Matthews, for example, can sprint on the flat but is one of the smaller guys and so better able to sprint uphill.
The cameras are loving the Marcel Kittel group at the moment, I guess it is something new for them to focus upon.
Kittel's Quick-Step team-mate Fabio Sanatini has dropped back to help him out.
Hmm, Steve Cummings is one of six out the back with Marcel Kittel. They trail the peloton by 30 seconds.
A slight sense that the temperature of the stage is on the up.
The breakaway group - back to five - still lead by 90 seconds but the peloton seems a little more strung out.
Too strung out for Marcel Kittel, who is out the back.
#bbccycling
Geoff Kidd: Ask @robhayles1, external explain why short incline finishes don't suit pure sprinters please. Have so much power on the flat.
We'll try our best.
Rob Hayles
Former GB cyclist at the Tour de France
Wow - Kittel is on his own here and has completely lost his legs there!
Hmm, was Rob Hayles talking about the impact of the wind there? Well, a gap has started to appear in the peloton.
It is definitely strung out a little bit more at the moment. Green jersey Marcel Kittel has been dropped. Tough work.
Just a reminder that BMC's Greg van Evermaet is the current Olympic road race champion.
He has been talked about in terms of being a strong contender for this stage since before the race started.
"That is why there is so much pressure on him," explains Rob Hayles on commentary. "The wind is starting to have an effect."
The lead group are over the category three Cote du viaduc du Viaur. Thomas de Gendt was first, Tommy Voeckler second, Reto Hollenstein third and Maxime Bouet fourth.
Poor old Timo Roosen was just about to catch them up - finally - after his mechanical when they sprinted off to decide who would be first over.
Rob Hayles
Former GB cyclist at the Tour de France
I get the impression Fabio Aru is taking each day as it comes, happy he has the jersey and anything that comes from this point is a bonus.
It is like when Geraint Thomas had the jersey, a little as though he couldn't quite believe it.
Gear trouble for Timo Roosen, who has to change his bike. He now has to weave his wave through plenty of motorbikes and team cars to catch up with the other four. Sweaty work.
They are at the foot of the first of the day's two category three climbs.
"Not much of a climb," says Rob Hayles on commentary.
Simon Brotherton estimating on commentary that it may well be 16:45 BST by the time the stage has finished, a slightly later finish than initially thought.
You've definitely got time for a brew before this stage hots up.