Curreny symbol in web pages

When I access Natwest online banking or Motor websites that display monetary amounts The symbol shown is in Thai script and is their sign for Baht, their local currency. I am using Win XP pro and IE6. My computer is set up for Engish UK and English US with the pound sign as default for currency.
If I access tools menu, internet options in IE6 and general tab, then fonts, I see 'Thai' displayed in the language script box, which would seem to be the problem. However when I change this to Latin Based or User defined and click OK, the window panel closes as if accepting the change. But when I open it again it has reverted to Thai. How can I force the change?

 

Further info

I have found that all other computers I have seen so far, 3 Thai and 1 English, are also unable to change that Language script option, on ly the actual font. How can I change the default without re-installing XP, surely there must be a registry setting for it?

 

amazed Hi

Till someone else here steps in,, set them up with us english as the first language, and use something common like new times roman.

Lonny