Lewis Hamilton lays down challenge to Sebastian Vettel in Belgium

An impressive Lewis Hamilton lay down the title gauntlet to Sebastian Vettel after soaring to the top of the time sheets in second practice for the Belgian Grand Prix.

Hamilton, who will take part in his 200th race on Sunday as Formula One returns to action following its summer hiatus, finished 0.262 seconds clear of Ferrari's Kimi Raikkonen, while Vettel was only fifth.