Our car in due to be delivered in the new year. By then we will be on the Octopus GO tariff that has a four hour window at night of 5p kw. I know that the M3 can be scheduled to start a charge to fit that start time, but now I notice that it also has a departure time. Can I charge in that four hour window only then again set a departure time for the afternoon to pre warm the battery and cabin without it charging the whole time?