Brittania is a horrible place where you either are the upper class and benefit from all the fine things in life at the expense of the lower class, or the lower class and get fucked over by everyone and you life in a ghetto. The upper class is basically Nazi Dictator Warlord Nobility, and the lower class are the equivalent of Jews in Nazi Germany, except I'm fairly certain they never get lead into showers and killed with nerve gas.yet again I agree with this statement, but am still confused as to why it pertains to the conversation at hand...
Why is this relevant? We're using it to imply there is blind intolerance in this thread. (aka go watch a few episodes of Code Geass and you'll get a basic understanding. Hell, go hang out with a guy watching a few episodes and pay minor attention to it. You'll catch on pretty quick. First Episode is mostly fluff and background, so watch it in full. Episode two has much more giant mecha IIRC, but Episode Three is where the Geass gets explained IIRC. Actually I think I have 1 and 2 mixed up a bit, Episode 2 was at a school I think, though that might have been episode 3 and I'm just really rusty)
To explain why you're confused, you're English and haven't watched Code Geass. "All Hail Britannia" is said a lot in Code Geass, and only by supporters of Britannia, who are the bad guys. First episode starts off and explains the situation, and quickly paints Britannia, a fictional nation, as massive assholes and basically the Nazi Party of the story.
Why am I comparing them to Nazi's if there are plenty of "bad guy" groups out there? Because it's pretty much universally understood that the Nazi Party were very bad. Bad enough that years after they have been wiped out, people still hate them. Hell, a bunch of brothers discovered they were descendent's of Hitler, and the last of his lineage. They vowed to never get married and never have kids. That's how much people hate the Nazi's. I know you know this, but I figure I should record this anyway in case this gets read by someone who is from a reality who never had Nazi's or never had ones like we did. Never hurts to explain.