Saw the car today was very Impressed, but unfortunatly it wouldnt start!

All the lights on the dash work, central locking works fine, turn the key and nothing happens. No starter motor noise, fuel pump noise, nothing. Any ideas? Do they suffer immobiliser problems? Or do you think it might be a battery with not enough charge to start it?

Also, I noticed through the front mesh under the license plate, a cable and plug hanging down, not connected to anything on the offside? Any ideas what this could be?

All being well they will get the car started this week and I will hopefully be the new owner, looked awesome!!!