I’ve just booked mine to be done anarl. Was not aware of this. No wonder they were so desperate to fit it. Probably be a cost for them to take the **** out.
They run as normal old school energy meters if you switch supplier so, at worst, you end up back where you were before you had the smart meter fitted. The energy monitor gizmo isn't much use really beyond establishing that you use more energy on days when you're mostly at home and showing that the toaster uses less energy than the kettle.