Tim+ wrote:

Theyre battery powered.

smart gas meters are battery powered (but brian has said before that he
gas no gas supply) but smart electric meters are mains powered, so will
have an internal PSU (presumably switch-mode) and there's precisely
nothing he can do to "unplug" that

Brian Gaff wrote:
Yes I'm worried though as presumably the modem and other bits of the
meter
have to have an internal psu as well which you cannot of course do much
about.