Has the club got any definitive current idea as to how many R8 Rover 200/400's are left on the road? How many left I don't fully trust the accuracy of and at the same time it doesn't record by individual registered models of a particular generation so I can't just search for all "Rover 200" and "Rover 400" because they don't make any distinction between the R8, R3 and HHR variants.
When you search how many left it suggests the following numbers as of Q4 2020:
Rover 200 series: Taxed: 3338 SORN: 9017
Rover 400 series: Taxed: 1584 SORN: 4239
I'm currently developing some interesting leads to get more accurate data based on VIN numbers (something I've been trying to do on and off for years) and one such lead is showing some early signs of promise at present

From that source I've been told there are currently 7214 R8 Rover 200/400's still about based on VIN information. I've not yet confirmed with my source if that is just taxed or taxed and SORN, but based on the howmany left numbers it would seem to suggest that number does likely include SORN vehicles.