Do you mean they will implement the restrictions that they could do now if they wanted, or
you won't be able to go to Europe for a holiday, or
you will have to stand still.
very good ,leaving aside the standing still comment (point taken )
as I under stand it the current freedom of movement for EU nationals coming to the U.K will end in 2019 & there will be no transitional arrangement or lead in period for 2 or 3 years as was suggested by some in government ??