Welcome to our LIVE coverage of the Belgian Grand Prix!

Button is charging! He fancies this - he's on the radio asking how far ahead the next cars are, and is told that they're eight seconds ahead but suffereing with blistering...

Button almost takes Rosberg at the end of the start-finish straight, but the German's line is impeccable and he hangs on - but Button goes through up the hill, his DRS virtually catapulting him past the Mercedes. Button is fourth!

Fernando Alonso's tyres are just about holding up - he's clearly looking to make one less stop than Vettel, and with the gap just four seconds now that could be a winning strategy.

Button gets right up behind Massa into the chicane - and he goes through! Frome's favourite son is up to fifth, and is inside a second of Rosberg already.

Button is truly flying - he's now closed right up on Felipe Massa in fifth, and is inside half a second. His pace is great, his tyres look in great shape still - could this be another memorable victory to match his amazing win in Canada?

Vettel's third set of tyres are starting to blister. He'll be on a seven-stop strategy at this rate... literally.

Button has gone past Sutil! The Force India locks up his brakes and the former world champions flies straight through into sixth place. That's some effort after starting 13th.

Jenson Button's race pace is superb yet again - and he's right up behind Sutil now.

At the half-way stage of the race now, and things look fairly settled for now until the next round of tyre changes.

Vettel 4.4 seconds clear of Alonso, Webber 2 seconds further back in third...

Perez will face a drive-through over an incident that took Buemi's rear wing.

Button goes past on the final chicane - but Schumacher outbreaks him, and manages to hang on through the section to keep 7th spot!

Button is right up on Schumacher now and we're in for a treat of a tussle.

Alonso's pit crew come on the radio reassuring their man that "it's not a disaster" that Vettel has pulled so far ahead. He's clearly trying to do a long stint, and banking on the German to ruin another set of boots.

Vettel has pulled out almost three seconds on Alonso - remember, his tyres were basically pristine at the restart.

Worth mentioning Michael Schumacher: he's up to seventh after starting from the back of the grid. That's some effort, and he's a second in hand over Jenson Button behind him.

Vettel makes his move up the hill on Alonso - and he's through! It's almost too easy to overtake on that section... The DRS is just an astonoshing tool at times.

Jenson Button takes Perez and Petrov on the first corner to get up to 8th!

Webber third, Rosberg fourth, Massa fifth at the moment - but Vettel is closing on Alonso all the time.

Alonso is away well, but Vettel quickly catches him up and he's inside a second of the Ferrari.

Vettel has made two stops already - he's bound to be into the lead soon after the restart