Ar 31 Awst 2023 cyhoeddodd Llywodraeth y DU ganllawiau newydd ar RAAC mewn lleoliadau addysg. Ers hynny, mae Gweinidogion Llywodraeth y DU wedi datgan droeon bod nifer o achosion wedi digwydd dros gyfnod yr haf a arweiniodd at risg ddiogelwch uwch mewn perthynas â’r defnydd o RAAC. Ni chafodd y dystiolaeth newydd hon ei chyflwyno i Lywodraeth Cymru ar unrhyw adeg.
On 31 August 2023 the UK Government announced new guidance on RAAC in education settings.  Since then, UK Government Ministers have repeatedly stated that a number of incidents happened over the Summer period which led to there being a heightened safety risk regarding the usage of RAAC.  At no point was this new evidence flagged to the Welsh Government.