There are of course no guarantees but presently I cannot see any indication England will disappear with Brexit in the Atlantic ocean.
I also cannot see any indication the Prime Minister will close the tunnel and reduce flights to the UK.
There are threats everywher but all this remindes me to the story of Asterix and being afraid the sky will fall on your head.
There are companies trying to make fast money by creating horror szenarios. They want you to form Irish, Malta or Cyprus companies. Dont take this game too serious.