In March 2012 the Coalition Government commenced a consultation on proposed changes to the legal definition of marriage so as to open the institution of marriage to same sex partnerships.
Ym mis Mawrth 2012 dechreuodd Llywodraeth Glymblaid y DU ymgynghori ynghylch newidiadau arfaethedig i’r diffiniad cyfreithiol o briodas a fyddai’n rhoi’r hawl i gyplau o’r un rhyw briodi.