At the start of the pandemic, official statistic on emergency calls to the ambulance service were paused, and daily data taken from management information was introduced.
Ar ddechrau'r pandemig, cafodd ystadegau swyddogol ar alwadau argyfwng i'r gwasanaeth ambiwlans eu rhewi, a chyflwynwyd data wythnosol a dynnwyd o wybodaeth reoli.