It is an unassailable fact that the vast urban sprawl in Sussex today, has very little to do with the historical needs of Sussex.
The spreading conurbation of the past 60 years, since WW2, is due to imposition on the county of migration from almost anywhere else in the world.
The same may be said of England as a whole.
There are people who have been calling for a population policy, and end to immigration, for at least that same period.
R W Standing