Unfortunately, there seems to be a problem with comments at the moment... Apparently there are two waiting to be moderated - but I'm not allowed to look at them... And one that I've just published (FH - hope the trial went well!!) doesn't seem to have appeared.
So, big apologies to those who've posted comments that have vanished into the ether.
Please keep posting comments - some are coming through. Make sure that you add them to the post you're talking about (not only is this much more logical, it makes it easier for me to check whether they're showing up or not) - and leave your first name or initials and your form.