Morning everyone - welcome to LIVE coverage from the final practice session in Turkey.

We'll be back at 12:00 BST for qualifying - can anyone stop the Red Bulls? Join us again to find out.

Interesting session - Vettel dispels doubts about his chances despite KERS troubles recurring, Mercedes looking very dangerous for the first time this season. McLaren clearly third in that session, Ferrari still off the pace. At the back of the field Liuzzi's HRT very close to the Virgin duo.

Nobody is going to go quicker than Vettel - so it's Red Bull, Mercedes, Red Bull, Mercedes, then the McLaren duo occupying the top six places.

Time is up - anyone on track has one more lap...

Webber up to third having shaved a few hundredths off his best lap. The Mercedes are back out for a final late run.

Vettel held up by Liuzzi in the final sector, but despite losing some time because of it, he's still the fastest - by a thousandth of a second!

All eyes on Vettel - the McLarens firmly entrenched in the pit, as are the Ferraris.

Webber posts a 1:26.4 which leaves him third. The Renaults take to the track a final time.

Vettel also back out on track. Will he be using KERS or not?

All the top seven in the pits. The danger man on track is Webber - who is just beginning a timed lap.

Alguersuari back on track after his earlier incident. Still time to put another lap or two down for the Spaniard.

Both McLarens (who've now dipped to 10th and 11th) out on track. Button goes third (1:26.5) and Hamilton fourth (1:26.7)

Problem for Alonso - he's stuck in sixth gear. That could well be the end of his practice session, and something for his engineers to fix before qualifying this afternoon.

Maldonado and Barrichello still going nowhere fast in the Williams - in 18th and 19th, and for the moment still in the pit lanes.

Right - the times are really coming down now - Rosberg 1:26.446 - but Schumacher much, much faster - 1:26.038

Rosberg on a flyer on the soft tyres - meanwhile Alonso has just pipped his Ferrari team-mate tot he top time - 1:26.819.

Vettel back into the pits - looks like his KERS is letting him down. Red Bull's pace this season is all the more remarkable given that they've not made the most of KERS.

Vettel receiving some instructions from the pits on his KERS - it's charging up in theory, but is it working properly?

Strange little tussle between Buemi and Heidfeld in the pitlane - the Renault man was dawdling and Buemi nipped by, pushing Heidfeld on to the grass.

Massa quickest - 1:26.883 - Vettel looks set to retake top spot but loses time in the final sector - but he's not running on the same tyres, and is therefore handing a huge advantage to the Ferrari.