A mere 5 days and 10 emails after raising the billing problem regarding my Next Drive Smart V2 tariff I have now relinked the Next Connect app with my car and it is, hopefully, associated with my import rather than my export account.

A smart schedule is set up for tonight and it is displaying 6.7p/kWh and a total estimated cost of charge. I haven't seen either of these figures before in the Next Connect app. Maybe they are picked up from the account, in which case it gives confidence that it really is connected to the import account.

Now just got to wait for a smart schedule to include times outside the normal off-peak period and to see how the bill takes account of this.