My local supermarket has a large, clearly laid out car park where some drivers circulate clockwise and some anti-clockwise. Quite a long time ago I rented a car while on holiday in the USA and was surprised to find a car park laid out with the "slots" placed diagonally. On reflection this was a very good system as you could only drive in one direction around the car park and a vacant space was immediately obvious. I can only recall one similar car park in the UK. How about starting a campaign for all new car parks to be "diagonal" and refurbishments made to the same standard?