Supermarkets are starting to use these specially designed "Shelf Fillers" to disguise shortages that are starting to be caused by Brexit now that the stockpiled stores from before Britain finally departed the EU are starting to become depleted. It isn't serious yet, but these signs are starting to pop up with increasing frequency.
Meanwhile, EU countries report full shelves and no shortages of anything.
It will be interesting to see, over the coming months, whether this practice becomes more widespread.
It will be VERY interesting to see if there are major shortages come Christmas time. Supermarkets might be able to get away with it in July..... but shortages in December....?
Time will tell.