Lone working is defined by the Health & Safety Executive (HSE) as people who work by themselves without close or direct supervision. This doesn't necessarily mean that the worker is physically alone; it means they are in a separate location to the rest of their team or manager.
The Health and Safety at Work etc Act 1974 – sometimes referred to as HSW, HSWA, HASAW 1974 or HASAWA - is the primary piece of legislation that governs workplace health and safety in Great Britain.