What are the UK statutory requirements for giving passenger safety briefings?

MCA Oral Exam Questions

Whenever passengers embark on any ship, a passenger safety briefing must be given, either immediately before or immediately after the ship sails, by way of an announcement which must:

(1) be made on the ship's PA system or by other equivalent means likely to be heard at least by the passengers who have not yet heard the announcement during the voyage; (2) be made in English and any other appropriate language; and (3) include clear emergency instructions. The briefing may be included in the passenger muster if this is held immediately before or after sailing. Information cards, posters or video programs may be used to supplement the briefing but may not be used to replace it.