Hi STx, My Economy 7 Night rate switching, stopped working recently, According to the Frequency Finder artical...
"different messages, are sent to different groups of meters" i.e some Droitwich RTS meters may still work

but mine, although a digital display type, just stays on day rate all time now...
I thought it may revert to Clock mode, but mine didn't

When you have a Smart meter installed, you can ask for it, to be set up in Dumb mode, and send readings in yourself
this is what I may do

Rod Watts