Welsh road signs
The BBC reports
that Welsh-language road signs mysteriously appeared on the Longthorpe Parkway in Cambridgeshire. They suspect it was the work of a practical joker. Presumably a Welsh practical joker.
Commenting is not available in this channel entry.
It may appear to be a "prank" as they were in place so far from Wales but if the contractor worked in Welsh and English speaking areas then it would be obvious why those signs were used.