Locale: why does Gnumeric think I'm an American?!

[Chris Seaton <chris chrisseaton com>]

My dates and currencies in Gnumeric all come out American style. My 
dates are back to front and everything is in dollars. I need a British 
locale.

What do I have to do to change this?

I'm using Gnumeric 1.4.3 on Linux 2.6, Fedora 4.

I'm pretty sure when I installed I told Fedora I was in the UK (several 
times, actually, time zone, keyboard, language...). There doesn't seem 
to be any applet in Fedora or Gnome to change my locale settings, so 
what do I do? Where does Gnumeric take the hint from? Please don't tell 
me it's hardcoded to be American.

Do I need to set some environment variables or something? How come 
Fedora didn't do that? What will happen to my existing Gnumeric files? 
Will they change to meet my new locale?

What do I need to do?

Thanks.

Chris Seaton.