Ensure that staff and visitors use washing facilities within desginated areas. All symbols where applicable conform to ISO 7010. These mandatory signs can be positioned as required. Available in a range of sizes and materials. The Health & Safety (Safety Signs & Signals) Regulations 1996 details that Mandatory signs must have a blue circular background which contains a white pictogram. Also available in economic pack of six. See 6-Pack Wash Your Hands Please Signs.