I think zero is more common in America than it is in this country. If I were saying the number 0.4 I would say nought point four, not zero point four. 0 x 4 would be nought times four equals nought. Zero might be the way it ought to be said over a radio transmission (or similar) but it's far more common in this country to say "oh" or nought in normal conversation.
I have never once heard James Bond referred to as zero zero seven! :grin:
And each time someone quotes their phone number at me (and let's face it they all begin with 0) I never hear anyone say Zero.
When I write numbers though, I usually put a line through the 0 to show it's a number, especially if it's a mixed code of letters and numbers :happy: I do wish people would do that more.
I work with computers a lot.