They faced increased pressure on their services due to the extended time needed to clean ambulances thoroughly once a patient with suspected Covid 19 had been transported to hospital.
Roeddent yn wynebu mwy o bwysau ar eu gwasanaethau oherwydd yr amser estynedig sydd ei angen i lanhau ambiwlans yn drylwyr ar ôl iddynt gludo claf yr oeddent yn amau bod ganddo COVID-19 i’r ysbyty.