Allan McNish ensured a practice clean sweep for Audi by setting the fastest time so far this weekend in the final Silverstone 6 Hours practice session.
As was the case in second practice, it was the R18 ultra of McNish and Tom Krsitensen which went fastest, with the Briton dropping down to a 1m43.628s late on in the session.
That came in the middle of a string of fastest laps for the #2 R18, although McNish's stint was halted eight minutes from the flag when he clashed with the #71 AF Corse Ferrari.
Olivier Beretta seemed ready to cede the line to McNish only to then cut across the front of the Audi, leading to light contact.
Benoit Treluyer in the sister R18 e-tron reacted to McNish's charge with his own late rally, eventually getting down to a 1m44.882s, just over one second down.
Toyota too responded to McNish's surge, with Nicolas Lapierre breaking into the 1m45s to put the lone TS030 Hybrid within 1.9s of the ultimate pace.
As the flag flew however Lapierre also hit trouble trying to pass a Ferrari, earning damage to his right rear as a result.
Nicolas Prost and Neel Jani's Rebellion Lola-Toyota meanwhile was the best of the privateer LMP1 entrants in fourth, little more than one second down the road.
The LMP2 lead changed hands several times as the session wore on, with the battle eventually decided when Alex Brundle broke into the 1m49s in the #42 Greaves Motorsport Nissan.
That left Alex, father Martin and Lucas Ordonez just over one second clear of the #35 OAK Racing Morgan-Nissan.
GTE Pro honours were settled in the final minute when Gianmaria Bruni went fastest in the #51 AF Corse Ferrari he shares with Giancarlo Fisichella. His effort demoted the sister JMW Motorsport Ferrari into second.
Aston Martin meanwhile locked out the top two spots in GTE Am, with the #99 Vantage finishing fractions faster than the sister #98 car.
Pos Cl Drivers Team/Car Time 1. P1 Kristensen/McNish Audi 1m43.628s 2. P1 Fassler/Lotterer/Treluyer Audi 1m44.882s 3. P1 Wurz/Lapierre/Nakajima Toyota 1m45.492s 4. P1 Prost/Jani Rebellion Lola-Toyota 1m46.500s 5. P1 Leventis/Watts/Kane Strakka HPD 1m46.589s 6. P1 Belicchi/Primat Rebellion Lola-Toyota 1m46.902s 7. P1 Brabham/Chandhok/Dumbreck JRM HPD 1m48.352s 8. P2 Ordonez/Brundle/Brundle Greaves Zytek-Nissan 1m49.524s 9. P2 Heinemeier Hansson/Baguette/Kraihamer OAK Morgan-Nissan 1m50.555s 10. P2 Mailleux/Lombard/Tresson Signatech ORECA-Nissan 1m50.633s 11. P2 Firth/Hughes/Hartley Murphy ORECA-Nissan 1m50.812s 12. P2 Potolicchio/Dalziel/Sarrazin Starworks HPD 1m51.066s 13. P2 Nicolet/Lahaye/Pla OAK Morgan-Nissan 1m51.229s 14. P2 Martin/Charouz/Graves ADR-Delta ORECA-Nissan 1m51.311s 15. P2 Perez Companc/Ayari/Kaffer Pecom ORECA-Nissan 1m51.418s 16. P2 Zugel/Gonzalez/Julian Greaves Zytek-Nissan 1m51.460s 17. P2 Sims/Jousse/Jousse Status Lola-Judd 1m51.950s 18. P2 Dolan/Hancock/Minassian Jota Zytek-Nissan 1m52.408s 19. P2 Panciatici/Ragues/Rusinov Signatech ORECA-Nissan 1m52.417s 20. P2 Liuzzi/Rossiter/Weeda Lotus Lola-Lotus 1m52.745s 21. P2 Giroix/Ihara/Deletraz Gulf Lola-Nissan 1m53.703s 22. P2 Holzer/Schultis/Albers Lotus Lola-Lotus 1m54.850s 23. GTE P Fisichella/Bruni AF Ferrari 2m01.937s 24. GTE P Walker/Cocker JMW Ferrari 2m02.068s 25. GTE P Lieb/Lietz Felbermayr Porsche 2m02.136s 26. GTE P Fernandez/Mucke/Turner Aston Martin 2m02.581s 27. GTE A Adam/Howard/White Aston Martin 2m02.920s 28. GTE A Goethe/Hall Aston Martin 2m03.256s 29. GTE P Bertolini/Beretta AF Ferrari 2m03.270s 30. GTE A Perazzini/Cioci/Griffin AF Ferrari 2m03.633s 31. GTE A Bornhauser/Canal/Rees Larbre Corvette 2m04.112s 32. GTE A Krohn/Jonsson/Rugolo Krohn Ferrari 2m04.746s 33. GTE A Belloc/Bourret/Gibon Larbre Corvette 2m05.748s 34. GTE A Ried/Roda/Ruberti Felbermayr Porsche 2m05.793s 35. GTE A Camathias/Palttala/Daniels JWA Porsche 2m08.005s