In message , The Natural
Philosopher writes

In this case it seems utterly specious, because any modifications and
structures that are more than 12 years old are I think de-facto outside
buliding control's remit.


It's be handy if someone could point to some documentation on this
aspect. I've heard various figures on this point, but I've not been
successfully been able to search out anything on the web on it.

Anyway, in this case it's meaningless as the car port is exempt from
building regs anyway. (well current ones, god knows what those in 1968
said)
--
Chris French, Leeds