How well do project managers in the UK understand current health and safety policies in the UK construction industry?Discuss

following questions:
RQ1: How well do project managers in the UK understand current health and safety policies in the UK construction industry?
RQ2: To what extent do project managers in the UK apply national policies in setting health and safety guidelines for construction project stakeholders?
RQ3: How successful have project managers been in ensuring health and safety in their project by following national health and safety policies?