The train goes straight to the door, with reduced rates for rail-show combination tickets.
It's really not fun though. Huge sheds with bored looking models, dis-interested 'assistants' and herds of people like, er, a herd of people in IKEA-like stupor looking for the WC and wanting to go home.
And kids swarming around the Supercar stands with their camphones. Sigh.
Buy a copy of Top Gear magazine and sit on your sofa...