BS7671 A4 publication and A3 transition status
A4:2026 published; A3:2024 valid until 15 October 2026observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | IET allows work to either edition during the stated transition. This public identity/status receipt does not establish unseen licensed clauses or the project’s contractual edition. |
| As of | 2026 |
| Source | IET, Ensure you are up to date with BS 7671, live edition checker. · Transition period: Brown Book remains valid until October 2026. |
| Review | checking…review by 2026-10-15 · standard cadence |
| Recorded changes | none recorded |
| Claim id | uk-bs7671-amendment4-transition |
Where the guide uses it
Not quoted in a chapter yet; it is kept in the curated register.
← Full numbers register — every date-stamped figure in the guide, with revision history.