Little bit of Porsche on Porsche between the No4 and the No.99 Proton Porsche, but all is well.
The lead is coming down. The No.5 is just over six seconds clear of the No.50. 31 laps completed.
Some traffic navigation has helped Estre put some space between himself and the cars behind.
Will Stevens says he has a lot of "washout" on the front while chasing his Cadillac team-mate. So, that will be hindering his chase on third-placed Estre in the No.6 Porsche.
Not much luck for the No22 United Autosports car. That's been given a five-second penalty for its next pitstop for shortcutting the Dunlop chicane.
Looks like we're about to get some Cadillac on Cadillac action, as the No.12 Jota-run car of Will Stevens has been told he can pass the No.311 Whelen Cadillac if he can do so cleanly. That would be for fourth.
The No.27 Aston that led earlier in this race and started on pole is being investigated for some kind of pitstop infringement.
The No.21 car has gone for a spin. That Vista AF Corse Ferrari is 12th in class.
The No.46 has been overtaken in LMGT3 by the No.10 Aston of Valentin Hasse Clot.
The No.50 Ferrari is asking "for a target" from his team, after being told not to worry about the gap ahead. It's currently 7.3s to the No.5 Porsche in the lead.
At WRT, Ahmad Al Harthy has come in for Kelvin van der Linde and leads LMGT3 in the No.46 car 1.1s ahead of the No.10 Racing Spirit of Le Mans Aston.
No change in LMP2, with the No.43 Inter Europol car of Tom Dillmann still top ahead of the No.16 RLR M Sport entry of Patrick Pilet.
The No.4 Porsche has had a driver swap, with Nick Tandy coming in for Nasr.
So, in the last half hour we've had a lot of stops. The No.5 Porsche still leads after all that though, while the No.50 Ferrari of Nicklas Nielsen is up to second after passing the No.6 a few moments ago.
The leading Cadillac is now the No.311 Whelen car of Jack Aitken.
Hour one is done and the No.5 Porsche continues to lead polesitter No.12 Jota Cadillac.
Report to follow...
Earl Bamber in the No.38 Jota Cadillac is coming under big pressure for third from the No.50 Ferrari. Green flags are out.
That was Paul di Resta in the car. He got caught by a GT3 car going through, got a bit loose and went straight to the barrier. He's back in. Yellow flags are out.
The No.93 Peugeot has crashed at the Porsche curves. It's ripped the rear bodywork off but has carried on. That will be straight to the pits.
Conway is being told he's got a bit of damage on his car.
The battle between Conway in the No.7 Toyota and the No.4 Porsche of Nasr is back on, with the Porsche holding firm into Mulsanne corner. That's all very tight!
The No.193 car is also under investigation.
The No.46 BMW was complaining about the brake bias on the car right now. Would explain some of its early struggles, though it is back into third in the LMGT3 class.
The No.22 United Autosports car is being investigated by the stewards for that tangle with the No.193 GT car and for an unsafe rejoin.
Andlauer's lead is back up above five seconds, so the pace in that Porsche remains strong right now over the Cadillacs.