Warning Signs - A warning sign is a type of sign which indicates a potential hazard, obstacle or condition requiring special attention.This section contains all our hazard warning safety signs, these safety signs are all designed to warn the public and employees of the potential dangers which may be incurred around these areas. Warning safety signs include: warning labels, tie tags, general warning signs, chemical warning signs, electrical warning signs, dangerous substance warning signs, fork-lift truck warning signs and design your own warning signs. All signs are produced in accordance with BS5499 and ISO 7010 Safety Standards.