BS 7671 Amendment 4: What Electricians Must Do Before October 2026
BS 7671 Amendment 4 published on 15 April 2026. You can use it now. From 15 October 2026, it's the only valid standard for all new work and the Brown Book is gone. The key changes are a new chapter for battery storage, a new section for Power over Ethernet, and expanded AFDD guidance. Here's what it means for your jobs, your qualifications, and your certification paperwork — no jargon.