The number of patients spending more than 12 hours in A&E increased since the previous month and is the highest on record.
Mae nifer y cleifion sy’n treulio dros 12 awr mewn adrannau Damweiniau ac Achosion Brys wedi cynyddu ers y mis blaenorol a dyma’r ffigur uchaf erioed i gael ei gofnodi.