‘How gigantic’, you’re probably wondering. It’s a full metre longer than a standard Bentley Mulsanne, making it 6,575mm or 21-and-a-half feet long. The extension will have added quite a lot of extra mass too, so what we have here is a Bentley the size and weight of a lorry.

The extra length has been added to the wheelbase make space for a four-seater rear compartment. The face-to-face layout is reminiscent of private jets and helicopters; indeed, the seats themselves are about as close to Business Class as you can get in a car.

There’s much tech in the back too, with a bespoke HVAC system, iPad charging and docking stations and – a Bentley first – electrochromatic glass for the cabin partition and side windows that turns opaque at the touch of a button. Let’s not forget the obligatory bottle cooler and soft drinks cabinet with crystal glassware, either.

As ever, the finishes are deeply opulent, from the exquisitely veneered ceiling to the sumptuous upholstery. Honestly, it could only be luxurious if it had a gold-plated bathtub filled with bubble bath made from myrrh and a built-in dressing gown warmer.

The engine and drivetrain is standard-issue Mulsanne (6.75-litre, twin-turbo V8 producing 512bhp and 732lb/ft torque), but the chassis and suspension has been re-engineered to maintain the car’s strength and cope with the weight.

According to Bentley, the Mulsanne Grand Limousine was built by its in-house Bespoke division, Mulliner, to a customer’s commission. But we suspect Bentley will turn out more if anyone waves a suitable large cheque under its nose. Half a million would probably get your foot in the door.

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By Only Motors