In England and Wales, Portion M of Timetable 1 into the Setting up Restrictions 2000 calls for that ‘acceptable provision’ shall be designed for men and women to achieve access to – and subsequently use – a setting up and its services. VADs, VIDs, and EN54-23 compliance is usually bewildering, https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/