Silverstone: Buemi puts Toyota on top in first practice
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| Porsche leads Toyota but not on the clock |
Toyota topped the opening practice session of the 2017 World Endurance Championship at Silverstone.
Sebastien Buemi turned the fastest lap in Toyota's TS050 HYBRID, at 1m40.104s, in the #8 Toyota, some 0.781 seconds clear of the #2 Porsches 919 Hybrid of Brandon Hartley.
Mike Conway was third another 0.075s back in the #7 Toyota.
Aston Martin was 1-2 in GTE-Pro
PRACTICE ONE RESULTS:
| Pos | Class | Driver | Car | Time | Gap | Laps |
| 1 | LMP1 | S.Buemi, A.Davidson, K.Nakajima | Toyota | 1m40.104s | 0.000s | 36 |
| 2 | LMP1 | T.Bernhard, E.Bamber, B.Hartley | Porsche | 1m40.885s | 0.781s | 35 |
| 3 | LMP1 | M.Conway, K.Kobayashi, J.M.Lopez | Toyota | 1m40.960s | 0.856s | 33 |
| 4 | LMP1 | N.Jani, A.Lotterer, N.Tandy | Porsche | 1m41.335s | 1.231s | 39 |
| 5 | LMP2 | M.Beche, D.H.Hansson, N.Piquet Jr. | ORECA/Gibson | 1m45.913s | 5.809s | 31 |
| 6 | LMP2 | F.Perrodo, M.Vaxiviere, E.Collard | ORECA/Gibson | 1m46.138s | 6.034s | 38 |
| 7 | LMP2 | D.Cheng, A.Brundle, T.Gommendy | ORECA/Gibson | 1m46.505s | 6.401s | 36 |
| 8 | LMP2 | R.Rusinov, P.Thiriet, A.Lynn | ORECA/Gibson | 1m46.689s | 6.585s | 40 |
| 9 | LMP2 | N.Lapierre, G.Menezes, M.Rao | Alpine/Gibson | 1m46.826s | 6.722s | 26 |
| 10 | LMP2 | T.Graves, J.Hirschi, J-E.Vergne | ORECA/Gibson | 1m47.530s | 7.426s | 38 |
| 11 | LMP2 | H-Pin Tung, O.Jarvis, T.Laurent | ORECA/Gibson | 1m47.690s | 7.586s | 29 |
| 12 | LMP2 | J.Canal, N.Prost, B.Senna | ORECA/Gibson | 1m47.960s | 7.856s | 38 |
| 13 | LMP1 | O.Webb, J.Rossiter, D.Kraihamer | ENSO CLM/Nissan | 1m48.224s | 8.120s | 31 |
| 14 | LMP2 | R.Gonzalez, S.Trummer, V.Petrov | ORECA/Gibson | 1m49.249s | 9.145s | 19 |
| 15 | GTE Pro | N.Thiim, M.Sorensen, R.Stanaway | Aston Martin | 1m59.110s | 19.006s | 39 |
| 16 | GTE Pro | P.D.Lana, P.Lamy, M.Lauda | Aston Martin | 1m59.342s | 19.238s | 39 |
| 17 | GTE Pro | S.Mucke, O.Pla, B.Johnson | Ford | 1m59.492s | 19.388s | 32 |
| 18 | GTE Pro | A.Priaulx, H.Tincknell, L.Derani | Ford | 1m59.500s | 19.396s | 36 |
| 19 | GTE Pro | R.Lietz, F.Makowiecki | Porsche | 1m59.517s | 19.413s | 32 |
| 20 | GTE Pro | M.Christensen, K.Estre | Porsche | 1m59.655s | 19.551s | 23 |
| 21 | GTE Pro | D.Turner, J.Adam, D.Serra | Aston Martin | 1m59.730s | 19.626s | 42 |
| 22 | GTE Pro | J.Calado, A.P.Guidi | Ferrari | 2m00.181s | 20.077s | 30 |
| 23 | GTE Pro | D.Rigon, S.Bird | Ferrari | 2m00.271s | 20.167s | 39 |
| 24 | GTE Am | M.Wainwright, B.Barker, N.Foster | Porsche | 2m00.275s | 20.171s | 33 |
| 25 | GTE Am | C.Ried, M.Cairoli, M.Dienst | Porsche | 2m00.402s | 20.298s | 30 |
| 26 | GTE Am | W.Sun Mok, K.Sawa, M.Griffin | Ferrari | 2m02.271s | 22.167s | 37 |
| 27 | GTE Am | T.Flohr, F.Castellacci, M.Molina | Ferrari | 2m02.310s | 22.206s | 36 |