It was based on the DART design by Dizzy Addicott who finally sold the project to Jeremy Delmar-Morgan.

[1] The Marcos was sold as a kit car utilizing a fibreglass/GRP Monocoque with running gear & subframes from a Mini.

During its life it went through five versions with changes including sliding windows (Mark II), which also had a modified front licence plate holder.

The Mini Marcos was the only British car to finish (in 15th place) in the 1966 24 Hours of Le Mans: the drivers were Jean-Louis Marnat and Claude Ballot-Léna.

The 1966 Le Mans car was used for several more races, then sold and finally stolen in Paris in October 1975.