For most people a Grand Prix starts with a green light and ends with a chequered flag, but for the organisers work starts a year in advance. Tonight William Woollard tells the story of the army of 15,000 that makes it happen. Top Gear spent five days leading up to the British GP looking at the side of motor racing the spectator never sees. William Woollard also reports from the M1 on the unnecessary risks drivers take, and Frank Page tries out an interesting newcomer to the British motoring scene, the Bitter SC two-door coupe.