Brits are gone, but still subject to all the EU BS and also still funding it,......until 12/31/20. They have until the end of the year to work out all the details but I assume it's a hard break at that point regardless. At least until the end of this yr they still haven't regained their sovereignty. For one thing I know they still have pretty much open border with the rest of EU and have no control over that,.....which may become a concern.
I'd say F it and start stocking the channel with crocodillios and flood the tube. That'd keep what's out out. Trebuchet for getting what's in out. EU can try to invade with the army they don't have if they don't like it. Guess that's why I'm not in charge.