The X-1 is the most ambitious example yet of McLaren Special Operations' (MSO) expertise. It has a whole new body made of advanced materials. Everything is bespoke, even down to the lights and wheels, necessitating new testing and homologation meaning the car took two and a half years to build, a process that began before the styling was signed off.

The X-1 had its own development programme because crucially, this wasn't to be a fragile concept car that would never see tarmac. It was to be a usable car, road legal and capable of travelling at supercar speeds. It also had to comfortably seat two adults so although the 12C was already as shrink-wrapped as it could be from a packaging perspective, the ingenious flexibility of the MonoCell allowed the creation of a completely different form while maintaining the engineering purity of a McLaren.

A full Computational Fluid Dynamics (CFD) aerodynamic testing schedule ensured high-speed stability, and the car also completed approximately 1005km of testing including two intensive testing stints at the Idiada circuit in Spain with chief McLaren test driver, Chris Goodwin. After testing, the whole car was meticulously rebuilt, by hand to concours standard.

MSO Programme Director Paul Mackenzie explains, "The X-1 showcases the skills of McLaren Special Operations. More and more luxury customers want bespoke or individual features. The X-1 demonstrates that we can provide the ultimate personalisation service. It also shows that MSO is not just a technology led company. X-1 demonstrates a commitment to perfection and to the highest levels of quality."

All body panels of the X-1 are made from carbon, and are finished in a rich piano black, as specified by the owner. Body sides are lacquered visual carbon fibre. "The black paint has no metallic or colour tints and is one of the most challenging colours to paint, but the finish is absolutely exquisite and befits the car perfectly," adds Stephenson.

The bespoke McLaren Special Operations division was launched at Pebble Beach in August last year. It offers a personalisation service that varies from simple trim changes to a whole new car – as showcased by the X-1. "We can realise almost anything. The only limit is the size of the customer’s imagination," says MSO Programme Director Paul Mackenzie.