Electric meter is fine and reports to the IHD. Comms hub looks fine SW, WAN, HAN and GAS all flash every 5 seconds.
Issue is with the Gas Meter. When you press A to read the meter, the LCD display is fully black, then comes up with the message Battery Door Open and then goes into a service menu. Which has options such as Event Log, Battery Change, Leave HAN, Flush Meter, Test Valve etc. You can't leave this menu.
Gas readings also don't get reported to the IHD.
Sometimes you can be lucky and be able to see the meter readings. But sometimes when you see the meter reading it quickly goes to battery door open and then stuck in the service menu.
Electric meter is Landis+GYR E470 Type 5394
Gas meter is Landis+GYR G470 672