I don't know the complete story but when I visited Mulfab years ago to get my sump skimmed, a Roadster was being built by Peter & Simon with innovative suspension at either end.
It was incomplete at that time.
I assume it’s the one a friend of mine bought, and it is now in the Warminster area. It is finished in Jaguar blue and was displayed at the Bristol Classic Car Show a few years ago. It has a 5 link rear and wishbone front. He is very pleased with it.