A "prohibition sign" means a safety sign prohibiting behaviour likely to cause a risk to health or safety. These health & safety signs are required to be red. A prohibition sign shall show only what or who is forbidden. Prohibtion safety signs generally use a black safety symbol in a red circle with a diagonal cross through.
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No smoking symbol - cigarette & smoke in black with red prohibition circle & line through, white text on red background.In 74 styles From £1.03