So why do you need a signals square? In fact, apart from non-radio ac, does anyone, honestly, still use those useless things?
They are still legally required at Belgian ultralight fields, though their operation is shaky at certain places. But in France, the SIA (their CAA) is actually encouraging a/d operators to remove them, as I was told at Saint Yan last summer by a important-looking man claiming to work at SIA.
But I do not consider them useless. How can a pilot with no radio available, either not installed or not operational or not replied to, know what runway to use? Or do you prefer the French habit of picking one's own preferred runway? Even in my very limited experience I have seen that provoke some frightening situations, even with all planes doing full radio.