Well, that’s another Easter break over.
The trip home was without incident other than the fog+drizzle in Cornwall, horse boxes and slow traffic on the A roads up to Truro and the rain just before Exeter, and this on a day where most of the UK was basking in sunshine. Indeed, by the time I got home the sun was shining and the temperature was up to 25C! Crazy for mid April.
The car is definitely running in now as I got ~38mpg out of it on the journey. I have discovered that GM have cut even more costs as turning the air conditioning off doesn’t actually save petrol. On the old 9-3 the aircon pump was disconnected when the “ECON” button was pressed so it didn’t cause drag on the engine and hence increased the fuel efficiency.