Yn 2023, dechreuodd yr Awdurdod Glo archwilio tomenni categori B – mae wedi archwilio tua 220 hyd yma a bydd yn parhau i archwilio drwy gydol eleni.
In 2023, the Coal Authority began inspecting category B tips – it has inspected approximately 220 to date and will continue inspections throughout this year.