Adding to my last message, I've used Regional and Language options in Control Panel (XP, by the way) and there is no option to change the keyboard to English UK. All other languages are listed except the one I want. Any solutions?
I remember with installing XP I selected all options for UK (English language) but yesterday I noticed a doco displaying in English US format. At the bottom of my screen on the toolbar is a capital EN. Clicking on it enables me to toggle between US and UK settings.