Sure, all the planning and control is procedural code, but vision is done with neural nets. If the training set didn't include particular kinds of markings that are peculiar to the UK, the net is highly likely to be less accurate at recognising those markings, compared to other styles of markings that are closer to what it was trained on.There's no neural net in the old Autopilot we have. It'll just be vision mapping out Lane markings and a lot of code.