Andy, it won't surprise you to learn we've almost the same situation here, Caterhams are not always welcome in some grids because they are too fast, not expensive enough regarding big GT's and the driving level is often high.
Anyway, you know me now, would you like to come and race in France alone or with some friends, no doubt we'll find an arrangement. You are very much welcome.
The NK HTGT grid listed is the Dutch one I guess? Not the english version.