Cafodd yr egwyddor o roi’r bleidlais i rai carcharorion o leiaf ei chefnogi mewn ymgyngoriadau a gynhaliwyd gan Senedd Cymru a Llywodraeth Cymru. Awgrymodd pwyllgor o’r Senedd y dylid ymestyn yr etholfraint i garcharorion a phobl ifanc sy’n y ddalfa sydd wedi cael dedfryd o lai na phedair blynedd.
The principle of giving at least some prisoners the vote was supported in consultations undertaken by Senedd Cymru and the Welsh Government.  A committee of the Senedd recommended prisoners and young people in custody serving sentences of less than four years should be enfranchised.