well it was 86% in 2011 for England and Wales, probably higher when you count Scotland and northern ireland, so to 80% is already a big drop.
can't be that far off for some of the bbc stuff
what was the period drama in an alternate England with all the diverse cast, people are going to grow up thinking muslims and chinese were here hundreds of years before they really were.
BBC rewriting history or trying to under the fantasy guise.
How people form opinions, think and feel is being programmed from a young age like some weird dictatorship, people can't have their own opinions any more and our national treasure is a large part of it.
indoctrination aka brainwashing on a mass scale