Guy Martin vs David Coulthard at Silverstone - Speed F1 Special

Guy Martin and his Tyco BMW Superbike take on David Coulthard and a Red Bull RB8 Formula 1 car in a series of head-to-head challenges including a drag race, a brake test, a slalom and a circuit race. To watch the full episode click here - http://www.channel4.com/programmes/speed-with-guy-martin-f1-special