Yes, I got a call from the Seat workshop today who informed me that there was a faulty connector in the ECU, where a pin wasn’t making contact. Maybe it came loose on my previous drive the day before, but I would expect it to have flagged a fault immediately? Otherwise strange that it happened to just break over night...
They want to keep it tomorrow to do an extended test drive and check for any further faults so all being well I’ll get it back Thursday, and try to get specifics of what connector failed.