Pretty low key session for Williams so far.

Felipe Massa is currently down in 15th, 1.9s off the pace while Lance Stroll, who scored a maiden podium last-time out, is P17.

Better from Lewis Hamilton as, free of traffic, he goes third fastest with 1:05.929, half a second down on Sebastian Vettel.

Pole position for Hamilton today will move him to within one of Michael Schumacher's record of 68 career pole positions, meaning he could equal it at the British Grand Prix.

Big incentive.

Lots of gasps and cheers from colleagues around me. Has something amazing happened on the track? Nope, they are all engrossed in the rugby.

Sounds like a thrilling encounter between New Zealand and the Lions, so if you want to follow that then head here. but please keep me company. Feel like I am talking in an empty room at the moment...

Valtteri Bottas takes over at the top of the timesheet with a 1:05.726, but his stay in P1 is brief as Sebastian Vettel goes even quicker with a 1:05.726.

Jeremiah Kariuki: Lewis Hamilton's fans are getting used to this! hard work and good speed. But then the points got to Vettel!

Mark Anthony Murphy: People claiming #Vettel, external endangered lives with his stupid move, get a grip! It was handbags and it's been dealt with, get over it!

Jim Clifford: Had it been Vettel that changed a gearbox I suspect that the F(errari) I(nternational) A(id) would have found an exemption.

Image source, Getty Images

Lewis Hamilton is hampered by a bit of traffic and he kicks off his morning with a 1:07.734. That puts him way down in 15th.

Valtteri Bottas heads out and swiftly slots into fourth with his first time - a 1:06.555 on ultra-softs.

No time yet from Lewis Hamilton, although he is starting his run now.

Daniel Ricciardo is told he is losing a little bit of time into Turn 6. The Australian is a tenth of a second slower than his Red Bull team-mate Max Verstappen, who has lowered the benchmark a tad to 1:06.015.

Image source, .

Carly Taylor:#Smashing, external coffee whilst working, watching Rugby & listening to #bbcf1, external#AceMultiTasking, external

Jennie Gow
BBC Radio 5 live pit-lane reporter

Raikkonen is not in a position to go out. The whole of the front is off, it looks like they are working on the balance. They must have found a small gremlin in the works.

Image source, Getty Images

Right, lots of times on the board as teams swiftly get down to business.

Ultra-softs are largely the order of the day as Max Verstappen goes quickest with a 1:06.082.

Lewis Hamilton has been out for an installation lap but no sign of Valtteri Bottas yet, or the Ferrari of Kimi Raikkonen.

Amit Mandalia: Thinking about the talk on Sainz’s future. If he leaves STR will that be only non-champion to actively leave Red Bull program?

It's been quite the start to the weekend for Carlos Sainz after he suggested his future was away from Toro Rosso, while Red Bull chiefs insisted he would be at the team next season. He also had a massive off yesterday as well, so this is not the start to the day he will have wanted.

On scamper some marshals to wheel away his Toro Rosso and we're back going again...

Sainz stopspublished at 10:05 British Summer Time 8 July 2017

10:05 BST 8 July 2017

Uh oh. An issue already for Carlos Sainz. He has come to a stop on his installation lap.

Kevin Magnussen and Stoffel Vandoorne are the first two drivers to head out for a wander. One installation lap and back in they go.

Vandoorne is told he has new brakes in his McLaren.

Andrew Benson
Chief F1 writer

Image source, Getty Images

Things had gone so well for Honda on Friday, their new-spec engine running well and Fernando Alonso eighth fastest in second practice. Unfortunately, a problem was discovered with the MGU-H in Alonso’s “Phase Three” engine overnight and it has had to be changed - and the new one is the previous “Phase Two” engine. What does that mean? Well, it turns out my initial sources were a little optimistic in claiming a 26bhp power hike for the Phase Three. I am now reliably informed it is more like 10bhp. So, useful but nothing to be excited about - as Alonso has always been saying. The good news, if there is any, is that Alonso won’t be losing out too much by the reversion to the old engine. Team-mate Stoffel Vandoorne still has the new one.

Commentary is live now online and you can listen via this very page.

It wouldn't be the Austrian Grand Prix without someone wearing lederhosen and playing an accordion...

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Final practice is go!

Some tweaks have been made to the kerbs at Turns 9 and 10 after some drivers suffered damage to their cars when they ran wide there yesterday.