From early December 2020 to the end of January 2021, all testing routes saw an increase in the proportion of tests authorised in one calendar day.
O ddechrau mis Rhagfyr 2020 hyd at ddiwedd mis Ionawr 2021, gwelodd pob llwybr profi gynnydd yng nghyfran y profion a awdurdodwyd mewn un diwrnod calendr.