Brexit: I live in the UK and often travel to France for work or personal reasons
Do I need to apply for a visa?
Until April 12, 2019, you do not need to apply for a short or long-stay visa to enter and stay in France. A passport or identity card is enough.
[In case of agreement]
From April 12, 2019, if the withdrawal agreement is approved, you do not need to apply for a visa to enter and stay in France. A passport or identity card is enough. This possibility will be available until December 31, 2020, end of the transition period.
[In the event of "No Deal"]
From April 12, 2019, you may be asked to provide a short-stay visa.
The European Union has also submitted a proposal for a regulation exempting UK nationals from a short-stay visa, subject to reciprocity by the UK authorities. Details are expected.
For any stay longer than 3 months, you would have to apply for a long stay visa and a residence permit.