Cherie,
If we become aware that a property needs to be re-categorised, we advise the owner before we issue the next notice, and include information regarding their right of appeal. That way there is no rude shock to them when we issue the notice, and it also means we don’t have to do any adjustments after the event if we get it wrong.
Not sure, but I don’t think this issue has been tested in Court yet.
Ken