Middlesex University researchers have discovered that the smell of lemons whilst driving adds zest to difficult journeys and generally improves driving performance. You can now buy car vapourisers that plug into the cigarette lighter socket. Pop some lemon scented aromatherapy oil in and away you go. What a good idea. Lemon and Orange scented aromatherapy oils are good for keeping you awake, focused and alert. Maybe more British drivers should try this. It might help prevent some of the accidents on the road.