Andre Greipel wins sprint finish
Peter Sagan second, Mark Cavendish third
Chris Froome remains second in general classification
Tony Martin remains in yellow
The riders have been out on the road for more than two hours 45 minutes now, with the average speed a touch under 40km per hour. There are about 80km left and the pace has quickened over the last 15 minutes.
Some riders have started to disappear out the back, including Orica-GreenEdge rider Michael Matthews, who injured a rib during a crash on stage three and is clearly struggling.
Yet more superb memories of your battlefield visits.
There were four Cofidis riders involved in the crash that led to the retirement of Nacer Bouhanni.
There are around 90km left today as the riders pass through the food station. As expected, Pierre-Luc Perichon's endeavours out on his own have come to a close. Well, it can get lonely out there.
More on the intermediate sprint - John Degenkolb came third, Cav rolled in fourth and Peter Sagan, who started the day in white, was fifth.
Image source, APQuote MessageFellow history graduates and Blackadder fans will recognise many of today's place names as key sites from WWI. The stage started with Team Sky's Chris Froome and Pete Kennaugh laying wreaths in Arras, and Australian team Orica - GreenEdge are all wearing black armbands to commemorate the fallen ANZAC soldiers. The riders actually cross the infamous River Somme five times today and pass Australian, British, Canadian, French, German, Kiwi and South African cemeteries. Sobering stuff.
Matt Slater, BBC Sport at the Tour de France
Pierre-Luc Perichon is first through through the intermediate sprint. I don't think his breakaway will be lasting much longer.
Andre Griepel - the Gorilla - is second, winning the sprint that takes place behind Perichon.
Movistar's Nairo Quintana is back with the main field after suffering an earlier mechanical.
We are 3km from the intermediate sprint in Rancourt....
We asked for your memories of visits to the battlefields - and there are some really excellent ones so far. Thanks very much.
Text me your thoughts on 81111. Or tweet #bbccycling
Ripped lycra day continues.
They've gone again - TV pictures indicating another crash. A few riders are not getting up all that quickly. Team Europcar's Bryan Coquard was down again and is looking thoroughly cheesed off with life right now.
We asked for your memories of visiting the battlefields.
Text on 81111 or tweet #bbccycling
Anyone visiting Belgium for the spring classics (or any other bike race for that matter) should make time to pay their respects at the Menin Gate,Ypres.A wonderful daily tribute to the fallen.
Gary J, Derbyshire
Stage finishes near Villers Bretonneux today. Australian War Memorial just outside that town. I played in a game of aussie rules against the French national side on ANZAC day earlier this year so hoping for an Aussie stage win today!
Paul in London
Hmm, scratch that, it has at least stopped raining.
Meanwhile, wit from the finish line...
We are through 70km and Pierre-Luc Pericho's lead is roughly one and a half minutes.
It still looks pretty grim on the road but we haven't had a crash for at least five minutes (cue pile-up).
The intermediate sprint is at just a tad more than 90km.
Team Sky rider Geraint Thomas is in no doubt about the way today's stage is likely to pan out.
"Barring anything really crazy happening, today will certainly be one for the sprinters," said the Welshman. "There will be a lot of teams looking to set it up for a bunch sprint, especially if they've not had the chance for one so far.
"In terms of contenders there's obviously the pure sprinters like Mark Cavendish, Andre Greipel and Alexander Kristoff. There is Slovakia's Peter Sagan too, who is looking to defend the green points jersey."
Image source, Tour de FranceI'm starting to lose count of crashes and riders hitting tarmac. This time Bryan Coquard goes over after getting it wrong on a corner. Coquard, of course, is a sprinter. We've already lost Bouhaddi. Do none of them fancy the sprint (into a headwind) later?
It is all getting too much for Team Katusha.
We asked for your memories of visits to the battlefields. Paddy obviously experienced better weather than the riders are experiencing today.
Quote MessageAn hour and a half into today's meander south from Arrras to Amiens and the peloton has covered about 50km. Pierre-Luc Perrichon of French wildcards Bretagne - Seche Environnement (we need to find them a nickname) has gone a tad further as he has been on a solo mission out in front. His lead has got beyond two minutes but it's coming down again now. There have been a few tumbles in the pack behind him. Bauke Mollema and Team Sky's Nico Roche have been down but look fine. Apart from that everybody seems to be keeping powder dry for a wet and windy run-in. Could be very lively.
Matt Slater, BBC Sport at the Tour de France
As mentioned, today's route takes us past several World War One battlefields, including Bullecourt, Pozières, Péronne and Villers-Bretonneux . Australian team Orica-GreenEdge are wearing a special jersey that features a commemorative armband in remembrance of the 295,000 Australians who fought in the conflict.
The cyclists have just gone past the Canadian memorial.
And another crash, with Bauke Mollema and Nicholas Roche involved in this one.