From 2010 to March 2021, more than 67,100 lower income households have benefitted, saving an average of more than £300 on their annual bills.
Rhwng 2010 a Mawrth 2021, mae mwy na 67,100 o aelwydydd incwm is wedi elwa arnynt, gan arbed dros £300 ar gyfartaledd ar eu biliau blynyddol.