5. A working platform shall—
(a)be of sufficient dimensions to permit the safe passage of persons and the safe use of any plant or materials required to be used and to provide a safe working area having regard to the work being carried out there;
(b)possess a suitable surface and, in particular, be so constructed that the surface of the working platform has no gap—
(i)through which a person could fall;
(ii)through which any material or object could fall and injure a person; or
(iii)giving rise to other risk of injury to any person, unless measures have been taken to protect persons against such risk; and
(c)be so erected and used, and maintained in such condition, as to prevent, so far as is reasonably practicable—
(i)the risk of slipping or tripping; or
(ii)any person being caught between the working platform and any adjacent structure.