They will need two PCR tests.

Minister for Health Stephen Donnelly has said that with new changes coming for those travelling from Britain, new restrictions are to be put in place. Minister Donnelly said that due to the growing concern over the Delta variant which is now the biggest strain in the UK, those who are travelling from the UK that are fully vaccinated will still need to quarantine. Following Cabinet approval on Tuesday, those who have not been fully vaccinated will need to quarantine at home for at least 10 days, with a day-10 PCR test that will be free of charge on top of the day-five test. Once the two tests come back negative, only then can the person leave quarantine. But under new rules, those who are fully vaccinated must also now quarantine when coming into the Republic of Ireland from Britain, but for less time. They will be required to quarantine at home for five days, at least, and then they will need to produce either a negative or non-detected PCR test on day five in order to end their quarantine. The Department of Health said in a statement that they are still advising against all non essential travel abroad, and all passengers coming into the country from non-designated states needing to show a negative/non-detected PCR test, along with 14 days of home quarantine. PCR tests can be booked on the HSE website and are free for all international arrivals, and can also be done through any HSE walk in testing centre. Stephen Donnelly said in a statement: "At the moment, variants of concern continue to pose significant risks to public health and there is a specific concern around the Delta variant." It also said that the HSE has put more contact tracing measures in place for positive Covid cases "with a travel history extending back 14 days and their close contacts". It said: "Enhanced public health measures and investigations are also being implemented from all positive detections upon notification of a “probable” result to ensure that all efforts to trace and contain transmission for any case which has a suspicion of being a variant of concern are taken."