John, I have apologised for hijacking the thread and going defensive when feeling threatened. If it makes you feel any happier then, yes, I do feel that {list supplied by John P} could be equaly unsuitable. It was a lot easier to talk about the subject in hand than it was to list every single possible combination. I apolgise once more for my laziness.

I was quite happy that the thread had fallen off the end of the page in the 4 days between my last post and yours. If you would care to do the same then the sensationalist 'headline' of the thread can die the death it rightly deserves.

Many thanks in advance.

Cheers

DtG