I'll offer up my experiences with various energy suppliers and sm's
Prior to moving house 3 yrs ago, we were staunch BG customers( well I did work for them for over 30 yrs..) had smart meters fitted and had no issues…,
To 2017, moved house to a brand new estate, all properties were supplied by E-On and had smart meters fitted.
We stayed with E-On until we were acosted approached by Scottish Power in the Metro Centre one day…..They assured us lower bills…Ok, sign me up….So we left E-On for SP…..
Some time later, SP asked if we wanted a smart meter for each utility, told them they were already installed 'Oh, we cant read them' came the reply..
After being with SP for the year, conscious of the need to look for cheap deals, we returned to E-On as provider.
Sad thing is, although their meters are installed here, we still have to return readings to them on a quarterley basis..
So somewhere along the way, the system has fallen over….not working as it should..E-On's customer database isnt that clever to recognise a returning customer with smart meters already at the address…..