In Lord of the Flies,
...Piggy was an outsider, not by accent, which did not matter, but by fat, and ass-mar, and specs, and a certain disinclination for manual labor.
My understanding has always been that England is an intensely accent-conscious society, because accent is a class marker, and that class markers matter even more in English boarding schools than elsewhere (see Orwell's "Such, Such Were the Joys"). So why would Piggy's working-class accent not matter?
Obviously, I'm not English, and most of what I know about this subject comes from fiction. So maybe my premises are wrong.