Currently it appears difficult to go to London for two days. France has been classified as “amber” by the United Kingdom (which means that the circulation of Covid-19 is ” intermediate »), Travelers, even vaccinated, are subject to a 10-day quarantine during which visits from friends or relatives are prohibited. A shorter stay is possible but… it will have to be spent confined. In other words, if you want to go away for two days, you will have to stay alone at the hotel and unfortunately you will not be able to get to know your granddaughter.
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Also note that entry conditions are very strict. Within 48 hours of your arrival in the UK, you will need to complete a form on the UK government website in which your residence address will be requested. On the platform, you will also have to book two PCR tests which will be performed on the second and eighth day of your quarantine. If one of them is positive, the isolation period will be extended by 10 days.
If you are not vaccinated, a compelling reason is required for any travel to the UK (keeping her granddaughter is one). The certificate is available on the website of the Ministry of the Interior. It will be checked in France, before departure. If the reason is not valid, boarding will be refused.
Finally, once in the UK, you will need to present the original certificate of a negative PCR test within 72 hours. This certificate must include your name, date of birth or age, the result of the test, the date on which the sample was taken or received by the test center, the name of the center and its contact details, as well as the name of the test.
If these conditions are very restrictive, they are likely to change. The French Ministry of Foreign Affairs recommends that you regularly consult its website as well as that of French consulate in London.
Returning to France from the United Kingdom
The United Kingdom is classified “orange” by France, which means that the circulation of the virus is active but in controlled proportions and without dissemination of worrying variants. To return from the UK, French residents must provide a PCR or antigen test of less than 48 hours, and observe a seven-day isolation period.