“To be clear, there is no FORMAL designation of these zones in either country...” (per Fox News)
Did anyone claim otherwise. Try wearing a Yamaha in many parts of London and see what happens to you.
My Yamaha chafes too much when I wear mine.
“No go zones” have existed in America for some time, they are called “ghettos” here. Don’t believe me, try going into some south Chicago neighborhoods on your own, you will quickly learn it is not someplace you should be traveling about. To be a bit on the safe side, ask a Chicago cop who works those “beats”, even they don’t like having to be there. Those areas may not be occupied by all muzzies but the out come can be the same.