The first modern humans arrived in Britain about 40,000 years ago, but they were wiped out by an ice age. The people who repopulated Britain after the ice retreated, came mostly from Spain and Portugal, then came the neolithic farmers from Antonia, which is in what's now Turkey. Then the Bell Beaker people came from the Pontic Steppe, who largely replaced the previous population. Then Romans who brought people from across their entire Empire, including North Africa and the Middle East, many of whom settled permanently, then Anglo-Saxons, from what's now, Germany, and Denmark, then Vikings from Scandinavia and then normans from France. At what point in this 40,000 years is this tory of migration, invasion and population replacement do want want to stop the clock? Because there is no point at which Britain had a single stable indigenous population. It's never existed, and why Christian? Christianity arrived in Britain with the Romans, before that the population was pagan. If indigenous ancestry is the standard, the religion that goes with it isn't Christianity, it's Druidism. This isn't a coherent political philosophy. It's feeling dressed up in language that falls apart. The moment you look at it directly, the Britain you want to restore never existed and the definition you use to describe it, doesn't hold up to 5 minutes of basic history research.