As the first product in Bentley Mulliner's new Coachbuilt portfolio, the new Bacalar affords its 12 customers even greater opportunity to express their personal tastes in the form of the ultimate open-air Grand Tourer.

While work on the new car is paused until Bentley's Crewe headquarters reopens, the process of developing the unique, bespoke specification of each example can begin.

Sharing not one exterior body panel with any other Bentley model, the Bacalar is a true statement of master craftsmanship, with ultra-bespoke interior finishes being limited only by the imagination of customers.

The style of each of the 12 Bacalar examples will be uniquely specified in collaboration with individual customers and the Bentley Mulliner team. Never before seen paint options, exterior treatments, interior finishes and materials are the essence of what makes the Bacalar a genuine coach-built car.

'The Clerkenwell' specification typifies the spirit of the Brooklands racetrack where early Bentleys competed, and encapsulates a modern, effortless style accentuated by British racing heritage. The name refers to the Central London borough of Clerkenwell, home to a collection of the city's oldest architecture, as well as some of its finest creative minds. Focusing on the classic contrast of dark green and browns, Moss Green exterior paint is paired with Cumbrian Green and Golden Oak hides, contrasted with stitching in Saddle thread and the use of Cheltenham Tweed. The veneer is a new concept - Honey Larch - providing a further contrast to the interior. Exterior brightware is in Dark Bronze Glass, carrying the colour theme out of the cabin and linking the interior and exterior palettes.

'The Menlo' is named after Menlo Park, Palo Alto, California, where many of the greatest entrepreneurs gather at leading technology companies. The bold and unmistakable colour of Cobalt runs throughout The Menlo, defining the car's exterior finish as well as its interior atmosphere.

Contrasting the subtlety of a Beluga hide with accents of Cyber Yellow truly highlights the interior's definition and surfaces. The ultra-modern textile of Anthracite Alcantara is complemented by a Piano Black veneer.

Downtown Chicago's 'Fulton' River District designed for those in the know and creating a more esoteric theme. The deep and evocative exterior finish of Lacquer Red is exemplified by light, revealing all of the Bacalar's true design in detail. 5,000-year old Open Pore Riverwood alongside Piano Black veneer embellishes the interior with a sense of history and depth, coupled with hides of perforated Mulliner Beluga and Hotspur accents. Gloss black brightware and Beluga Alcantara textile adds to the understated theme.

Heritage style meets contemporary minimalism in a car inspired by bespoke tailoring and the English countryside - London's 'Greenwich' borough is therefore the natural association; ever-evolving, but never forgetting its roots.

Cricket Ball hide is the distinctive touch of British, flattered by a Grey Tweed textile. Open Poor Riverwood in parallel with High Gloss Riverwood once again contrasts the new with the old. Details of matt black brightware and Camel contrast thread finish off the interior theme.

'The Brickell' refers to Miami's financial district, defined by its high-rise buildings, luxury apartments, art galleries and boutique stores. The Brickell therefore is a brave statement of intent, most notable by its new concept Atom Silver paint contrasting with strong exterior and interior accents in concept Hyperactive. Brunel hide adds to the confidence of this car's specification, alongside the exclusiveness of Open Pore Riverwood and Piano Black veneer. Grey Tweed textile adds a touch of class and sophistication.

'The Randwick' is a car handcrafted to inspire awe, provoke conversation and seek out like-minded company, which is why it was selected as Bentley's demonstration car. Yellow Flame paint enlightens the cars exterior, exemplified by Gloss Black highlights, showing off the Bacalar's exterior in even greater detail.

This theme continues through to the interior, where Beluga hide and Grey Tweed textile is contrasted by bright Khamun accents. Dark Bronze decorates brightware with an exquisite and unique finish, never before seen on a Bentley.

Bentley is also launching a design-your-own Bacalar competition via Twitter. Both adults and children are invited to download a blank template of both the Bacalar's exterior and interior, which can be customised in any number of ways. The best designs will be adjudicated by Bentley's Design team, and featured and highlighted on the channel.