I view my overall safety in much the same vein as riding a motorcycle, which could end badly in the case of any shunt, whichever way you look at it in such a small and vulnerable vehicle. I take your point though and it would be interesting to know what hoops MMC have had to jump through in terms of Homologation for the new car - things are probably an awful lot tighter now than they were in 2011 when they aligned the then new M3W to the regs?
Since it's homologated as a motorcycle I don't think it needs to comply to any crash test