Ar ôl i Maldives, Nepal a Thwrci gael eu hychwanegu at y rhestr goch o 04:00 o'r gloch ddydd Mercher 12 Mai, mae'r rhestr goch a’r rhestr oren o wledydd yn parhau’n ddigyfnewid. Felly hefyd y gofynion ar gyfer cwarantin wedi’i reoli (lle bo’i angen) ac ynysu a phrofi cyn ac ar ôl cyrraedd.
Following the addition of Maldives, Nepal and Turkey to the red list – from 4am on 12 May – the red and amber lists of countries remain unchanged, as do the requirements for managed quarantine and isolation and testing before and after arrival.