Posting this here as a 'just in case'. I added the EV Anytime tariff to my OVO account and installed an Indra smart charger and so far has worked perfectly, it charges at all sorts of different times when it's plugged in, but always gets to my chosen 80% by the 'ready by' time and often much sooner. However, I recently added the Ovo Charge Anytime App - just because - but my experience is that it's a huge battery drain. Took me a while to work out what it was as I'm new to the car and it lost a chunk of charge overnight which had never happened before. Remembered reading on here about vampire 3rd party apps (have looked to see if the Ovo app is called out elsewhere, but couldn't find it) and as soon as I uninstalled the Ovo app, drain has gone back to an absolute minimum. Given the app is unnecessary anyway, at least with my setup, just thought it might save others looking at going with OVO a potential issue if they do.