For additional guidance, please see WHO's Q&A on Coronavirus (or check for similar in your respective home countries):
The UK: https://www.gov.uk/travel-abroad
France: https://www.gouvernement.fr/info-coronavirus
The Netherlands: https://www.rivm.nl/coronavirus/covid-19/vragen-antwoorden
Germany: https://www.bundesgesundheitsministerium.de/coronavirus.html
Ireland: https://www.gov.ie/en/publication/472f64-covid-19-coronavirus-guidance-and-advice/