I'm replacing two fuse boxes by one CU.
There are 16 mmsq tails from supply to meter - from meter to Henley block - from block to fuse boxes.
Do I really have to use 25mmsq tails from Henley block to my new CU?
Other than (possibly) satisfying regs - I can't see it makes any sense.
(The new meter was installed in the last 10 months - fitter didn't change any of the tails)