Mae Ysgrifennydd y Cabinet dros Ynni, Cynllunio a Materion Gwledig, Lesley Griffiths ac Ysgrifennydd Amgylchedd yr Alban, Roseanna Cunnigham, mewn llythyr ar y cyd at y Canghellor a’r Ysgrifennydd Gwladol dros Ynni a Thwf Glân, yn galw ar Lywodraeth y DU i drefnu cyfarfod â Gweinidogion ar unwaith i benderfynu ar drefniadau tymor hir newydd fydd yn gyson â’r setliad datganoli.
The Cabinet Secretary for Energy, Planning and Rural Affairs, Lesley Griffiths and  Environment Secretary, Roseanna Cunningham, in a joint letter to the Chancellor and Minister of State for Energy & Clean Growth, call for the UK Government to initiate immediate Ministerial discussions to determine successor long-term arrangements in line with the devolution settlements.