British Government
https://www.gov.uk/foreign-travel-advice/france/coronavirus
https://www.gov.uk/foreign-travel-advice/france
https://www.gov.uk/guidance/coronavirus-covid-19-testing-for-people-travelling-to-england
French Government
https://www.gouvernement.fr/en/coronavirus-covid-19
https://www.interieur.gouv.fr/Actualites/L-actu-du-Ministere/Certificate-of-international-travel
https://www.gouvernement.fr/info-coronavirus/pass-sanitaire (in French)
Irish Government
https://www.gov.ie/en/publication/77952-government-advice-on-international-travel/
https://www.dfa.ie/travel/travel-advice/a-z-list-of-countries/france/