I have sorted this problem out now, sorry to leave the place in a mess 
:-/ ;-)
I don't use Thunderbird that much (to be honest this is my first go on a 
mail client - I'm not too keen on them), so I was just figuring out how 
it works.
Thanks for everyone's words of welcome and help :-D
Becky
 > Please post to: Hampshire@???
 > Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire
 > LUG URL: http://www.hantslug.org.uk
 > --------------------------------------------------------------