Os byddwch yn penderfynu bod angen i chi ffurfio swigen Nadolig, cymerwch ragofalon i leihau'r risg drwy atal cyswllt cymdeithasol diangen y tu allan i'ch aelwyd cyn gynted â phosibl, ac am o leiaf bum niwrnod cyn i chi gwrdd ag aelwydydd eraill yn eich swigen, a thrwy weithio gartref os gallwch chi. Ni ddylech ymweld ag aelwyd arall ar unrhyw gyfrif os ydych chi, neu unrhyw un ar eich aelwyd, yn teimlo'n sâl neu'n hunanynysu.
If you do decide you need to form a Christmas bubble, take precautions to minimise risk by stopping unnecessary social contact outside your immediate household as soon as possible, and for at least 5 days before you meet other households in your bubble, and by working from home if you can. On no account should you visit another household if you, or anyone in your household, is feeling unwell or is self-isolating.