The phrase "Duck don't Grouse" comes to mind on reading a report in the Sun that after a spate of HGVs hitting bridges they are too high to go under and too heavy to use, councils across England are demanding lorry drivers should be banned from using sat nav systems designed for cars because they cause chaos when they go down roads that are too small for them or on bridges they’re too heavy for.  Having just replaced a rather expensive wing mirror that was taken out by a lorry down a country lane in the UK, I have to agree.