Thanks for that. I had a quick browse over that, some of it confused me but i'll go over it properly tomorrow.
But basically, going off this quote -
Wouldnt that mean the 12A could be registered ? Lets just say roughly a KE10 is 700kg, It would allow an engine capacity of 2100cc, and plus that additional 15% it would be around 2215cc allowed, which would cover the 12A.. Yeah ?