alt Hacker NewsI am also based in London. When I work for American companies I attempt to use American spellings in code and documentation, because consistency matters. For general communication I use British English because I won't get American English right, humans and search mechanisms can cope with the difference and I can express myself most effectively that way.
Incidentally, isn't "based out of" mostly an American idiom? I usually use "based on" or "based in" and find "based out of" and "based off" conjure images of poorly constructed buildings. (Don't get me started on "based off of".)
Nice catch! It never made sense to me either, to say "out of" when actually it is "in", quite the opposite. I guess I worked mostly with American companies, while educated in British English.
I think "based out of" refers to the work communication going "out of" where the person is "based in". But still, it is far cry from the natural "in".