Whenever there is a fall risk present, either from a roof or a raised surface such as a loading bay or mezzanine floor, you are legally required to provide a form of fall protection.
This will usually come in the form of edge protection such as guardrail, either freestanding or fixed, or another barrier system.
However, if access is required to this raised area via a ladder or staircase, such as for maintenance, and you are unable to close it off with a barrier, then you will be left with a void. This void could be considered a risk and might lead to injury or legal trouble should you be subject to a HSE inspection.
So, if you cannot close the area off, but you also cannot leave the access point open, what are your options?