Thanks all - your replies are very encouraging! Sab, I have struggled with that font on the home page endlessly.
Alas the wywiwyg software that I use has a glitch and keeps putting it back that way and as it is an unusual program it uses lots of JAVA and won't be edited by other programs. As I've done all the charts with it I can't redo the site with a new program without spending 100s of hours on it. They have just brought out a new version, so hopefully an upgrade will do the trick.
Lesson, don't buy cheap web editing software!