Wow - thanks for those pictures Mark, you can really see how schizophrenic the car is. At least Lawrenson chose to copy the Countach LP500 prototype lights, which I have always preferred to the production versions. I can see that the windscreen is completely flat too, so it obviously isn't the same as the Dome, or the CW311, each of which did have at least a little bit of curvature.

The Dome was developed over several years beginning in 1975, while the CW311 project was developed in 1978, so in theory the Dome didn't copy any of the German car's lines (which tends to be evident when performing a straight comparison between the two), but the windscreen treatment in each case is remarkably similar - hexagonal rather than trapizoidal, resulting in a distinctive front wing/A-pillar design.

There's some in-car Youtube footage of a circuit lap in an Isdera Imperator, the near-unique windscreen shape results in acres of unusable space in front of the dashboard...

Lauren