Ensure compliance with UK fire safety regulations using this Glow In The Dark This Door Must Remain Unlocked Sign. Designed for emergency exits and fire escape routes, this sign remains visible in low light or power outages, helping to guide building occupants safely. Ideal for commercial and industrial settings, it meets HSE requirements and supports ISO 7010 standards. Manufactured from durable, photo-luminescent material, it automatically charges under natural or artificial light. With a clear message in bold white text on a green background, this fire safety notice is crucial for areas where unlocked access must be maintained for emergency egress. Easy to install and available in multiple sizes, it's suitable for offices, warehouses, retail units, and public buildings.