Quite a few. Spelling and pronunciation are quite different, and also a bunch of words and idioms that don't match.
Not enough to prevent mutual understanding, but it can get close. As an American, if I haven't watched any British TV for a while and try, there's a good few minutes where I have to listen to most of it twice to be able to understand what was said.
Not enough to prevent mutual understanding, but it can get close. As an American, if I haven't watched any British TV for a while and try, there's a good few minutes where I have to listen to most of it twice to be able to understand what was said.