In article ,
"Christian McArdle" writes:
I'm going to go ahead with 25mmsq and will then get supply company to
upgrade their bits when I've finished everything.

The bit between the meter and the Henley block is all yours, too. You don't
need to call the electricity company in to replace that part.

Yes it's yours, but you can only replace it if your meter
has a separate cover over those terminals, and older meters
don't. (Breaking any seals that gain access to the meter
inlet and voltage coil terminals could get you into serious
trouble.)

--
Andrew Gabriel