Thanks for your insight...
I was insured with my R33 GTS-T and all its mods when on my p's, as are/were a million other p-platers with R33 GTS-T's and other cars over the power to weight limit.
It's not illegal to own a car over the power to weight limit, its illegal to drive one. Many P-platers have been paid out when making a claim on a car over the limit, so again nothing is set in stone and all comes down to the individual case.
Forgot to mention that I was insured with 2 different insurance companies at different times with my R33, both while on my P's