Five riders have joined back on with Magnus Cort Nielsen and Bauke Mollema.

They are: Lilian Calmejane, Domenico Pozzovivo, Ion Izagirre, Michael Valgren and Toms Skujins.

So that makes seven riders chasing down Rafal Majka, who still leads by 27 seconds.

Rafal Majka drives on down the descent, holding his gap over Bauke Mollema and Magnus Cort Nielsen to around 25 seconds.

The peloton are 7km further back just about arriving at the summit of the Pic de Nore.

Dan Martin has a minute on the main bunch.

Tom Fordyce
BBC Radio 5 live commentator, in France

Primoz Roglic's personal best in his previous career as a ski-jumper is 183m.

Peter Sagan is more than three minutes behind team-mate Rafal Majka on the road.

The world champion is going to need to descend like an absolute mad man to make it back.

Meanwhile, Dan Martin is nearly a minute in front of the Team Sky-led peloton back down the Pic de Nore.

Bauke Mollema and Magnus Cort Nielsen are the next two riders over the summit, trying to chase down Majka.

Rafal Majka stays away solo to cross the summit of the Pic de Nore alone.

He wins 10 points in the king of the mountains classification - I make it that that takes him from 11th to fifth in that competition, now on 28 points.

Can he stay away to the finish?

Rafal Majka drives up onto a very exposed, narrow road and now just has 1km to go to the summit.

He leads the chasers by 40 seconds.

Jeez. A fan nearly stumbles into Rafal Majka inside the final 2km of the climb.

Fortunately the Pole gets through unscathed and shakes his head. The fan gets an angry shove from the following motorbike rider.

Team Sky are grinding away up the Pic de Nore on the front of the peloton, Geraint Thomas safely ensconced in the line.

Dan Martin is now 34 seconds up the road. He's nearly seven minutes down on Thomas on GC so Team Sky won't be too bothered about his grabbing a bit of time back.

But what about the rest of the top 10?

Rafal Majka has built a 30-second lead over nine chasing riders on the Pic de Nore.

The Pole, who has three Tour stage wins and won the polka dot jersey in 2014 and 2016, has 3km to go to the summit.

Dan Martin has a lead of 16 seconds over the peloton with still around 56km to go. Brave.

Rafal Majka catches Julien Bernard and eventually rides away from the Frenchman.

The Bora rider has 5.5km to go to the summit of the Pic de Nore.

The peloton are now 13'38'' behind him on the lower slopes.

This is interesting. Ireland's Dan Martin, currently 10th on general classification, has attacked the peloton on the lower slopes of the Pic de Nore.

Rafal Majka leaves the rest of the break behind and sets off in pursuit.

Fabien Grellier has been dropped and Majka has reeled him in.

He's heading towards the back wheel of Julien Bernard now.

This category one climb finally prove too tough for Peter Sagan.

The world champion has slipped two minutes down on the main chasers of Fabien Grellier and Julien Bernard.

Our team of Tom Fordyce, Rob Hayles and Gareth Rhys Owen are on air to guide you through the final stages of stage 15.

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Serge Pauwels effort is continued by Michael Valgren.

That surge has taken back a big chunk of the gap to the leading pair - Julien Bernard and Fabien Grellier now have 1'12'' with just over 8km left of this climb.

Bernard and Grellier have 10km to the summit of the Pic de Nore, leading the chasing pack by 2'04'' - Poljanski is not setting a high enough tempo.

And now Serge Pauwels hits the front. Can Peter Sagan hang on?