[notahacker]

An interesting idea but tenuous. The Parliamentary homeland in the southeastern counties mostly voted for Brexit outside London, Cambridge and Oxford [Oxford being a royalist redoubt surrounded by Parliamentarians on the Civil War map rather than the reverse]. The Remain voting areas of England were mostly conurbations which didn't exist during the Civil War, some of them like Liverpool being in predominantly Royalist areas. Overall, the local population didn't get much say in which areas were occupied by which troops back then either.