Maverick Viñales led a Yamaha 1-2 in first practice for the British Grand Prix, pipping team-mate Valentino Rossi by almost two-tenths.
The 2016 winner posted a best tome of 2:02.073 to top the timing screens, beating Rossi by 0.189s to give the Yamaha team a perfect start to the weekend.
Ducati's Andrea Dovizioso just missed out on splitting the duo though as he finished just 0.001s adrift of his fellow Italian rival with a time of 2:02.263.
Home favourite Cal Crutchlow, on the back of signing a new deal with LCR Honda through 2020, was fourth quickest, 0.328s off Viñales’ benchmark, with Jack Miller finding a bit of form to round out the top five on his customer Ducati – 0.900 off the top spot.
Jorge Lorenzo was sixth for the factory team ahead of Tito Rabat and Andrea Iannone.
Championship leader Marc Marquez didn't enjoy the smoothest session as he spectacularly attempted to save his crash at Turn 16, but it was to no avail. He escaped unharmed and finished tenth quickest behind Johann Zarco, ninth.
Aprilia Racing Team Gresini’s Aleix Espargaro had a mechanical issue midway through the session, the Spaniard though was able to get back out on his second bike.
