Stage 12: Pau-Peyragudes, 214.5km
Romain Bardet sprints clear to win stage 12
Chris Froome slips to second as Fabio Aru takes lead
Froome cracks on brutal final climb to finish
Commentary on BBC Radio 5 live sports extra from 14:00 BST
Michael Matthews drops off the back of the breakaway on the Port de Bales.
The Aussie may well just be taking things (relatively) easy before trying to work for Sunweb team leader Warren Barguil later on.
The breakaway are onto the lower slopes of the hors categorie Port de Bales.
It's a 11.7km long climb, with a 7.7% average gradient.
The toughest and longest climb of the day - who in the break can hold on over the top?
The breakaway have eked out a bit more of a gap to the peloton, now leading by 4'26'' as Team Sky continue to control the pace behind.
Bouet and Feillu are about a minute in front of the peloton.
Fortuneo-Oscaro duo Maxime Bouet and Brice Feillu have attacked the peloton, trying to ride across to the leading group.
All the GC favourites happy to let them go.
Feillu won on the highest stage finish of the 2009 Tour in Andorra and always looks to make a charge over this terrain.
The race goes over the Port de Bales today, a climb that featured in one of the most notorious moments in recent Tour history.
On stage 15 in 2010, race leader Andy Schleck dropped his chain and Alberto Contador attacked, taking the yellow jersey off Schleck and holding it all the way to Paris.
Contador was later stripped of the title after testing positive for clenbuterol and the 2010 Tour was awarded to Schleck.
Break of 11 riders lead by 4'13''
The breakaway swing through the 50km to go marker, their advantage keeps coming down.
Britain's Steve Cummings is still in there.
So, the race is taking a relative respite in this valley between the Col de Mente and the Port de Bales.
That calm will be utterly shattered when they reach the hors categorie Port de Bales.
But what on earth does 'hors categorie' mean, you ask. Let our BeSpoke team of Simon Brotherton, Rob Hayles and OJ Borg tell you all you need to know...
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Break of 11 riders lead by 4'00''
Team Sky laying it down on the front of the peloton in this valley before the Port de Bales.
That's cutting into the lead of the breakaway, with the gap coming down to four minutes.
Image source, Getty Images
BBC Radio 5 live sports extra
Right, our commentary team of Simon Brotherton and Rob Hayles are now live over on BBC Radio 5 live sports extra to guide you through the business end of Stage 12.
And you can also listen by clicking the tab at the top of this page.
Marcel Kittel is finally caught by the peloton, who are closing the gap to the breakaway.
That's in part because Team Sky are all still together on the front. Christian Knees and Luke Rowe did indeed make it over the Col de Mente and continue to control the tempo for leader Chris Froome.
Break of 11 riders lead by 4'44''
Michael Matthews looks round at the foot of the descent and realises he's left the rest of the breakaway for dead. The Aussie sits up, swerves around a bit and waits for his 10 partners to rejoin him. All back together now.
They have about 20km of relatively flat terrain to go until they hit the hors categorie Port de Bales.
BBC Radio 5 live sports extra
Here's your 10 minute warning for the start of commentary with Simon Brotherton and Rob Hayles on BBC Radio 5 live sports extra.
Break of 11 riders lead by 5'05''
The peloton roll over the top of the Col de Mente and join the breakaway on the descent.
Michael Matthews is out front alone at the moment, mainly because he's a better descender than his breakaway partners.
Sprinters do tend to be excellent descenders, courtesy of their bike handling skills in bunch finishes and the fact they often have to take time back on descents, having lost it on big climbs, in order to finish within the time limit.
So here are all the king of the mountains points winners over the Col de Mente:
Britain's Steve Cummings showed no interest in contending that - he's solely focused on stage victory today.
De Gendt, Matthews and Simon go off the front, in search of the summit and the king of the mountains points.
Matthews uses his sprinting skills to kick again, rolling over the summit first to pick up the maximum 10 points on offer.
The Aussie isn't doing that for himself, though. He's picked up the points to prevent De Gendt gaining too much on his Sunweb team-mate Warren Barguil, who currently leads the mountains classification.
Break of 11 riders lead by 5'16''
The leading break are just into the final kilometre of the climb of the Col de Mente.
Michael Matthews is doing really well to stick with this group. Britain's Steve Cummings looking very strong as he keeps up despite putting on his outer jacket in preparation for the descent ahead.
Break of 11 riders lead by 5'33''
A thick bank of fog shrouds the breakaway as they close in on 2km to the top of the Col de Mente, lead by Thomas de Gendt.
Yesterday's star Maciej Bodnar slides off the back of the peloton.
Who can blame him after his supreme effort on stage 11 that almost caught out the sprinters?
The Pole was part of a three-man break that went away right at the start of the 203.5km stage, before he then left his two partners behind and stayed clear of the peloton until he was agonisingly swept up in the final 250m as Marcel Kittel sprinted to victory.
Break of 11 riders lead by 6'05''
The breakaway have 5km left to the summit of the Col de Mente.
Meanwhile, around six minutes down the round, the peloton swing through the official start of the climb.
Will any team try attacking Sky to put Chris Froome under pressure early on?
Another view of Team Sky at the front of the peloton as they approach the Col de Mente.
Christian Knees and Luke Rowe still setting the pace - Chris Froome will hope those two hang on over the top of this climb and can work for him in the following valley before peeling off on the lower slopes of the Port de Bales.