Bentley has introduced an £8,400 ($9,500) business class rear seat option for its Bentayga SUV after one customer moaned about a bad back. The valued client requested that Bentley try and make the back seats of its luxury off roader more comfortable – and the tech-laden Airline Seat in the new long wheel base model is the result. The £8,400 optional extra offers the occupant sat behind the front passenger seat in the £211,400 car the ability to recline their seat and stretch out. At the touch of a button on a removable tablet that controls the seat, the backrest reclines, the seat cushion exte…