Overview: Charley Boorman tests modified cars powered by motorbike engines, Jonny Smith compares the fuel consumption of the Honda Insight with a standard diesel vehicle and Tiff Needell races two hatchbacks from the 1980s. Jason Plato reviews the new Ford Focus RS, Jonny Smith tries to make a profit at Europe's largest used-autoparts sale and Tim Shaw gives advice on speed-camera alerting systems. Last in the series.