The upturn in this measure in March 2019 (more easily seen in the percentage of returns received on paper), followed an earlier dip which led to action by the WRA customer service team.
Yr eithriad i hyn yw’r siartiau perfformiad a gweithgarwch ambiwlansys, lle mae’n ymddangos bod diweddaru arferion delio â galwadau ym mis Mai 2019 wedi arwain at newid yn nifer y digwyddiadau coch.