Thanks, that's much appreciated. My brain is working overtime here trying to make sense of it. I'm becoming convinced though that there isn't going to be a logical answer, so we'll just have to handle it if it happens again. Yes, there are indeed far too many idiosyncrasies in the format here! Let's think and talk about Aled instead eh? A much nicer way to use the brain cells!

I'll now move this section of the thread to the Forum Help File, delete the extraneous duplications of mine and head off to bed. I think I need a good night's sleep after this !

Susie.