I read with interest the article by Rupert Choat on the duty to warn about obvious dangers (24 August, page 48).

While the position in civil law may be complex, health and safety legislation is much clearer. The Health and Safety at Work Act 1974 places a clear responsibility on all employers, the self-employed and employees to do all that is reasonably practicable to protect themselves and others affected by their work.

We will only drive down injuries and fatalities on construction sites if everyone looks after their fellow workers on sites – whatever their role and employment status.

Stephen Williams, chief inspector of construction, Health and Safety Executive