You have had ten links giving direct proof of the widespread and continuing existence of these notices

If they were widespread they would be obvious to anyone.

None of us who actually live in the UK have seen one in the last 40 years. It seems you haven't either.

There is racism directed against Gypsies in the UK, but not this particular variety of it.

Let's see you find one on a current Google Street View picture of a British pub. If they're widespread it should be easy, right?