i saw the sign in the paper yesterday, interestingly from what i could make out without reading the article, the sign is blue with a white arrow, similar to a "you must pass this sign on the left" - but it would appear it's meant to mean "no lorries down this road (in the direction of the arrow) even if your GPS tells you to"
so when you get polish pete and his 50 tonner, is he going to interpet the sign as a "do not enter" or a compulsary diversion for large vehicles
didn't seem very well thought out tbh, considering most of the people out there struggle with the current crop of signs