Formula One returns after the mid-season break with the first free practice session from the Belgian Grand Prix at Spa.

Schumi and Webber back in.

Michael Schumacher comes out for a second run in this, his 300th race weekend.

Jenson Button and Mark Webber are out there, while Nico Rosberg stays out for a third lap.

You can gather wet weather data which may be useful over the weekend in sessions such as this, but when visibility is so low, it cannot be of much use - as HRT's Pedro de la Rosa points out.

Several further drivers have completed installation laps - on full wet tyres - for what they are worth.

Williams reserve driver Valtteri Bottas also tootling round, with Vitaly Petrov ahead of him in the Caterham barely visible from the cockpit.

Dani Clos, returning to action for HRT, ventures out. The car is throwing up plenty of spray.

James Frankland's in-depth look at this weekend's racing.

The hour-and-a-half-long session under way. Some drivers in their cars despite the levels of moisture on the circuit.

It is raining hard at Spa, the longest circuit on the calendar. Little surprise there then.

With the championship delicately poised, Will Gray considers whether now is the time for the leading teams to initiate team orders to chase down Alonso.

Can McLaren close the gap to championship leader Fernando Alonso?