The incorporation of the content of the amendment slip made in circular WG 011/2017 in relation to Approved Document B (Fire safety) Volume 2 WG 011/2017
Ymgorffori cynnwys y slip diwygio a nodwyd yng nghylchlythyr WG 001/2017 mewn perthynas â Dogfen Gymeradwy B (Diogelwch tân) Cyfrol 2 WG 001/2017