you are a British citizen

How to prepare for Brexit?

If you are a British citizen and you live, work or travel in France, you should plan ahead for the major changes that will be brought about by Brexit. You are a British citizen residing in France : request your residence permit now. 

This part of the website has links to the pages dealing with all the issues with which you may be faced, depending on your personal circumstances. Detailed information is also available on the websites of the relevant ministries. If you cannot find information relating to your situation, there is a Brexit contact in each ministry who deals with all the relevant subjects.