A friend of a guy on a Belgian forum has already spotted a new Bentley Continental Flying Spur on a Belgian highway. It had UK license plates, but the car was LHD. The colour is also pretty unconventional for a Bentley. Since the car still isn't delivered to the dealerships yet (though they will be soon), I suppose this is a test car for the press.
Don't mind the small pics, they are prolly taken with a cell phone: