O ganlyniad i argyfwng Brexit, mae cryn amheuaeth ynglŷn â pharhad y Deyrnas Unedig fel cynghrair wirfoddol o bedair cenedl. Ni fu’r Undeb erioed o dan y fath straen yn ystod fy oes i.
The continued existence of the United Kingdom as a voluntary association of four nations has been brought into fundamental question by the Brexit crisis – the Union has not been under greater strain at any point in my lifetime.