What it's about Graham is that someone is producing some additional models to race in the computer racing car simulator called Grand Prix Legends, and the models he is working on are the Bonnet Djets and Aerodjets.
The original simulator/game was a reasonably accurate simulation of the tracks and F1 cars used in the 1967 Grand Prix season. I remember installing it many years ago on a Windows PC I had at that time and trying to drive the full circuit at the Nurburgring - it was fantastic but so difficult. The program has since developed a big following and people have added other tracks and different cars, so you are not restricted to just F1.
So this guy is producing some Djets/Aerodjets to 'race' at Le Mans.
Roy