"Ymadael â’r Undeb Ewropeaidd yw’r her fwyaf sylweddol sy’n wynebu’r Deyrnas Unedig, ac mae’n her a ddaeth yn amlycach fyth yn sgil canlyniad yr Etholiad Cyffredinol.
“Leaving the European Union is the biggest challenge facing the United Kingdom, a challenge thrown into even sharper relief by the outcome of the General Election.