There must be more oil & grease plus detergents put down the drains from cooking and food preparation than washing my own car.
So if they were ever to implement and enforce this then they had better start coming around an washing my dishes too
A simple message here to the independent retailers, either sort out the utter BS that your representatives come out with or people will go elsewhere for their fuel.
Now I'm going back outside to clean a load of seagull crap off my car