i. Amendments to Appendix A (Performance of materials, products and structures) of Approved Document B (Fire safety) Volume 1 and 2.
i. Diwygiadau i Atodiad A (Perfformiad deunyddiau, cynhyrchion a strwythurau) i Ddogfen Gymeradwy B (Diogelwch tân) Cyfrolau 1 a 2.