My Lady friend, has been getting nagging letters to change her E7 "RTS" meter, but the fact is it's NOT a RTS meter - just a standard Landis & gyr meter.
It works fine, just a few mins off the correct time & an hour out in the winter But she knows that.
She does not want a smart meter!!
I'm not on E7, but they say my meter is out of date! - but OVO my company is merging with EON - who I gave up a few years ago _ I'll leave things for now......