Brian Gaff wrote:

I actually want EDF to put one in and am still waiting. It seems dual
fuel installations have priority. I also need the talking terminal bit

Even if they installed a non-talking one, you can choose how frequently
it reports usage to EDF, presumably you could login to their website and
the web-browser read it out for you?

The main issue with non sending of data applies to the gas part
normally, Its powered by a single cell battery

It's a specialised (Lithium Thionyl Chloride) D cell, about 68 watt
hours and supposed to last 10 years