Establishing a healthy and safe working environment for lone workers can be different from organising the health and safety of other employees. It will often be safe to work alone. However, the law requires employers to think about and deal with any health and safety risks before people are allowed to do so.
HSE advises that a risk assessment should help employers decide on the right level of supervision. There are some high-risk activities where at least one other person may need to be present. Examples include:
working in a confined space, where a supervisor may need to be present, along with someone dedicated to the rescue role
Lone workers
Health & safety guidance on the risks of lone working