The only theory that I have with this car is that it was especially built for the use of AML partner, Red Bull Formula 1 and was so well received, that Aston Martin decided to offer it as a special edition model.
V12 Vantage S Roadster Red Bull Edition
V12 Vantage S Roadster Red Bull Edition
(2017) Q by Aston Martin
The Red Bull Edition Vantages were never officially offered with the Roadster coachwork, but this particular car appears to be the exception. Almost everything on this car matches the spec of the Red Bull coupe including the satin Mariana Blue paintwork and the red highlights. This car was spotted at the Aston Martin facility in Gaydon in 2017 and despite not having and Red Bull logos, it should be considered one of the Red Bull cars.
V12 Vantage S Roadster Red Bull Edition