British English has a lot more variance than Yankspeak.
We're more likely to use "help V+ing" than "help INF". An average larger vocabulary, atop different usages. Even with US dominated media eroding our dialects faster than ever there's still a lot of difference out there.
I will need a more specific question to give more response. Are you a non-native English speaker living in the UK?
Eastern Europe would be the probable exception, due to the ever threat of Russian invasion.
(As for the Okinawan bases... I think all the sexual assault has something to do with it, beyond the fighting in the Second World War.)