Expert pick: Nissan’s next big car… or an Aston Martin?

Expert pick : Nissan's new car, the Leaf, has been hailed as a new kind of luxury vehicle by many automotive experts.But how much of this is good news for consumers and how much is bad news for manufacturers?BBC Sport takes a look at the pros and cons of Nissan's upcoming Leaf and Aston Martin.First up: Nissan Leaf What is the Nissan Leaf?Nissan's newest luxury car is called the Leaf and it will...