HSE's L108 guidance conflicts with the Control of Noise at Work Regulations 2005 it is meant to explain. An audiologist sets out what the law actually requires on workplace hearing tests, who is competent to carry them out, and where the guidance gets it wrong.
Most employers don't arrange hearing tests because someone tells them to. They arrange them because something happened. This is the 7-step guide that walks you through Regulation 9 from legal trigger to documented compliance.