Standards
Standards, in our own words
The standards and legislation our articles rely on, explained in plain English with the clause numbers, so you can check every claim against the source.
These are our explanations, in our own words, of the clauses our articles rely on. We do not reproduce the standard's text: the clause numbers are there so you can check each one against your own copy. They support the published standard and the judgement of a competent engineer, and replace neither.
BS 5839-8:2023: voice alarm systems
Emergency messages, standby batteries and the Annex C battery calculation.
BS 7827:2019: emergency sound systems at sports grounds and large venues
Terrorism (Protection of Premises) Act 2025 (Martyn's Law)
Who qualifies, the two tiers, the four procedures and notifying the SIA.
Each article that cites a clause ends with a table, Where this comes from, linking here and to the official source.