This Do Not Operate Sign is designed to clearly warn staff, contractors, and visitors not to use equipment or machinery that may be unsafe or out of service. Widely used across construction sites, factories, and workshops, this prohibition safety sign helps employers meet legal duties under the Health and Safety at Work Act 1974 and the Management of Health and Safety at Work Regulations 1999. The bold red prohibition circle and easy-to-read text make the message instantly recognisable, reducing the risk of accidents and promoting safer working practices. Manufactured in the UK from durable materials, it is suitable for both indoor and outdoor use and can be fixed to walls, doors, or machinery. This sign complies with ISO 7010 standards for prohibition safety symbols, ensuring consistency with HSE guidance. Ideal for workplaces where unauthorised operation of equipment could cause injury or damage, this sign provides a cost-effective way to reinforce site safety.