Mae Ysgrifennydd y Cabinet dros Gyllid  ac Ysgrifennydd Cabinet Llywodraeth yr Alban dros Gysylltiadau Cyfansoddiadol  wedi ysgrifennu llythyr ar y cyd at Weinidog Brexit Llywodraeth y Deyrnas Unedig.
The Cabinet Secretary for Finance and the Scottish Government’s Cabinet Secretary for Constitutional Relations have written a joint letter to the UK’s Brexit Minister David Lidington.