Hgv fuel costs a fortune !! Overfill is however a serious problem. Although it’s not only 2 wheelers that get crunched!. A previous splitshift family car was seriously rear ended when another car slid into it while stationery. Derv was found to be all along the local bus route, both directions! My insurance asked me to, and I did take photographs of the road, someone else paid for my car repairs , but the crashing cars insurance company( sentient beings insurance dot com ? ) claimed against first, second, stagecoach or whatever they call themselves. I don’t know the outcome, my car was fixed! Most of our fleet of hgv have stickers on the fuel tanks reminding drivers not to overfill. I do notice the smell quite quickly if my bike gets close to a spill, fuel, not impending off!!