18th Edition Amendment 4 Release: BS 7671 Update April 2026
Amendment 4 to BS 7671 was published on 15 April 2026, bringing major updates to the Wiring Regulations. Learn what’s changing and how to stay compliant.
18th Edition Amendment 4: Official Release Confirmed for April 2026
The next major update to the IET Wiring Regulations is now confirmed. The IET and BSI have officially signed off Amendment 4 (2026) to BS 7671:2018, with publication scheduled for 15 April 2026. This update will be a significant shift for UK electricians, introducing new requirements aligned with emerging technologies and modern electrical installations. [theiet.org]
Once published, Amendment 4 can be implemented immediately, and the existing version — BS 7671:2018 + A2:2022 + A3:2024 — will be withdrawn six months later.
What is Amendment 4?