BS 7671:2018+A4:2026 | A Technical Review of the Latest Wiring Regulations Published: May 2026 | Industry Insights by TMUK Group Ltd On 15 April 2026, the IET and BSI officially published **Amendment 4 (A4:2026)** to the 18th Edition Wiring Regulations. This update represents the most significant shift in UK electrical standards since the 2018 release, […]