Hi Lee,
Thanks for your help with this and pointing me in the right direction. I think I've almost got it but perhaps my workflow isn't quite right just yet.
I've created a symbol for the client name and created 5 other instances of it. When I change the text in one it changes in all of them which is great but I can't seem to change the font in one of them and then change the text afterwards. I click on the text layer, click the sync button so that it's not active, make the font change, click the sync button again and then try to change the text but the changes aren't reflected in the other symbols.
Any ideas?
Thanks again!