Economy 7 clock wrong

[JohnW2]

In the distant past, we had two meters - the usual black peak one, plus a white off-peak one. From memory, the entire supply, was either connected to one meter, or the other - so it was down to us, to have our own system(s) to switch on/off at the correct times.

Indeed - but that was largely superseded when 'dual tariff'; meters came along, in which there was time-related switching between the two registers.

 

[JohnW2]

I don't think anyone has any disagreement with that

Glad you agree.

Which surely has to be wrong. If has been mooted one of those actions changes by an hour but not the other (I hope I understood that correctly) then they could be paying for all of their hot water heating in that first 1½ hours of 'off peak time' at peak rate.

Don't 'shoot the messenger'. I have merely been reporting what appears to be the situation!

Having said that, there may be a problem in doing anything different if (as is essential to the grid) one is to avoid exactly simultaneous switching of potentially millions of loads. IF (by edict either of themselves, the manufacturers of 'smart meters' or Ofgem) I am right in saying that the registers of a 'smart' meter are constrained to have 'round' 30-minute periods (starting from 00:00 every day, then I can't think of any way of implementing the required staggering of load switching without getting load-switching and billing a bit out-of-synch - can you?