Silverstone GP2: Rio Haryanto edges Williams F1 junior Alex Lynn

In a tight session, Haryanto, Lynn and McLaren protege Stoffel Vandoorne all lapped within 0.067 seconds at the top of the field.

Currently third in the championship, Haryanto recorded his 1m40.659s relatively early in the 45-minute session.

Vandoorne, who is unbeaten in feature races this year, did the same, while Lynn's effort - ultimately just 0.003s shy - was set with seven minutes remaining.

Nick Yelloly was fourth for Hilmer Motorsport, despite stopping on track in the final moments, while Alexander Rossi, Arthur Pic, Pierre Gasly and Raffaele Marciello, fresh from F1 practice running with Sauber, completed the top eight.

Of the drivers to feature in pre-event seat swaps, Johnny Cecotto Jr led the way in his first session with Carlin, in 12th place.

Sergio Canamasas was 16th with Lazarus, one spot ahead of his replacement at MP Motorsport, Formula Renault 3.5 points leader and GP2 debutant Oliver Rowland.

Rowland also stopped on track late on, while series returnee Jon Lancaster was 25th in the second Hilmer entry.

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