Thank you. I'll certainly look at the Bright app but if, as I suspect, it is the end of day information being transmitted by the meter to the IHD then I'm not sure that this will be the answer.
I am currently 'tweaking' my heating system and I need to be able to look at reasonably accurate historical daily usage figues for my gas consumption. To give an example of what has happened recently -
23:08 - 68.32 kWh
23:38 - 2.78 kWh
The latter figure is then subsequently stored as 'Yesterday' which is quite meaningless.
The IHD has been absolutely fine for a several years until the October clock change a few weeks ago. My theory is that the meter is transmitting its end of day information to the data collection system before midnight and it is this that has started causing the confusing readings.
I have the IHD3 and the ivie Bud (activated at last this morning) both running at the moment so it will be interesting to see what happens tonight.