This futuristic super-car, complete with Batmobile-style vertical doors, has been spotted on the streets of London.

The unique machine – which boasts the memorable “CEXI” numberplate - was parked outside a fashionable boutique on South Audley Street in Mayfair.

Although based on a Rolls-Royce design, the car is understood to be a one-off private commission.

DC Design, an Indian super-car firm, constructed it for a wealthy British-based client a few years ago.

Rolls-Royce confirmed that the car was not one of their own one-off creations.

“As a bespoke firm, there have been times when we’ve carried out coachbuild jobs, but nothing quite like this,” a spokesman said.