I appeared before the Supreme Court to make oral representations on behalf of the Welsh Government at the hearing which took place over 13th, 14th and 15th June 2011.
Ymddangosais gerbron y Goruchaf Lys i gyflwyno sylwadau llafar ar ran Llywodraeth Cymru mewn gwrandawiad rhwng 13, 14 a 15 Mehefin 2011.