Welcome to our LIVE coverage of the final practice session for the British Grand Prix at Silvestone. The lights have gone green and cars are straight out onto the track.

That's it for now - many thanks for joining us, and we'll be back at 1pm for qualifying. See you then!

Vettel comes round for his best lap now, but he doesn't improve and remains third fastest.

Hamilton now comes around trying to out-do his team-mate - but he falls short! He improves to 1:31.633 but it's not quite enough.

Rosberg goes fastest with a 1:31.487! He's a quarter of a second ahead of Hamilton.

Rosberg is on a flier - he's nailed the first sector and is a quarter of a second ahead...

More trouble for Hamilton as he flies off wide, but comes back on safely.

Perez goes off the track again! He overcooks it completely through the Becketts section and ends up sliding sideways off the circuit! What a morning he's having...

Alonso goes out on the medium tyre and looks fast, but he loses it slightly by running wide on the final sector.

Cars flooding back out on the track now, with only the two Mercedes cars, Massa, and a few back markers still in their garages.

Back in the Ferrari garage, Felipe Massa is having his engine changed - just a precaution, the team says. More on the reasons as and when we get them.

Here coes Perez back out on the track! He's got the hard compound tyres on and gets his stint under way with a practice start.

Raikkonen improves his best ever so slightly to 1:32.459, but it still the only man left out there.

Everyone except Raikkonen is now back in the pits - it'll be final tweaks to get ready for qualiying, then straight back out.

Raikkonen falls right off the pace in the final sector of that quick-looking lap - Mercedes do seem a lot quicker in that final section.

Back in the McLaren garage, the crew have worked wonders and Perez is about to get back out there! Incredible what mechanics can fix in half an hour. And to think my local garage charged 1.25 hours labour to change brake discs and pads last week!

Kimi Raikkonen heads out onto the circuit once again and has set a flying first sector.

Hamilton's flying lap turns out to be a 1:31.750, and moments later Rosberg also crosses the line with a good one: a 1:31.833. The two Mercedes cars are the class of the field in this session so far despite those early problems.

Two big mistakes by Maldonado and Di Resta, both at the final corner before the start-finish straight. Both save their skids, with Maldonado pulling off a fabulous-looking powerslide all the way round. Career in rally beckoning, maybe?

Webber takes back fastest lap with a nice, tidy one - but Hamilton is still going and about to go even quicker on hard tyres that are now six laps old.

Fernando Alonso looks set to challenge Hamilton's time but makes a mistake in the final section and misses out.