I currently have two consumer units - one servicing the original house
and one serving my extension. As I get closer to completing the
extension I am now going to migrate the original CU circuits on to my
new extension CU.

All the ring mains can be integrated nicely, but I was wondering
whether the original lighting radial circuit can be added as a spur off
of the new lighting radial circuit, without contravening any electrical
regs.

Thanks for your input!

Quiggles