"The UK will deport EU citizens after Brexit if they do not apply for the right to remain in time, Home Office minister Brandon Lewis says."
See: EU citizens who miss registration deadline face deportation – minister (BBC News, link):
“He told a German newspaper they would have to leave even if they met all the criteria for a residency permit. Campaign group the3million, which represents EU citizens in the UK, said this was “no way to treat people”.”