https://www.citizensadvice.org.uk/cymraeg/Budd-daliadau/sick-or-disabled-people-and-carers/lwfans-cyflogaeth-a-chymorth-esa/tra-byddwch-yn-cael-esa/Rhoi-gwybod-am-newid-tra-bod-ar-Lwfans-Cyflogaeth-a-Chefnogaeth/
Rhoi gwybod am newid tra'ch bod ar Lwfans Cyflogaeth a Chefnogaeth - Cyngor ar Bopeth
What changes of circumstance to tell the DWP about while you're getting ESA, how to contact the DWP about the changes.