All the lights (except MESH) flash green every 5 seconds so hub appears to be OK.
I have tried all the options to connect, including having the IHD running in the meter cupboard.
Reading all the information about IHD units having to be uniquely configured to the consumer location I wonder if the installer had to configure something in the hub unit or is this all done over the WAN. Having changed suppliers various companies have tried reset the meter but the IHD has never paired. Does it sound like an engineer needs to change something in the hub to allow it to pair?