CAT 111,
Thank you for your reply and advice.
My apologies for the delay in acknowledging your advice as I wished to see if any other explanations would be offered.
I spoke to my pet geek today and he suggested that, as there were it seems problems with this site on Friday, this would explain why I did not get the responses I expected.
With regard to Facebook, it seems that when you join the site, they give you an email address. As I rarely use the site, and have the bare minimum profile information, I was unaware of this.
Norton can be a pain however, the "full system scan" followed by "finding and fixing threats" which results in two sites I use, this being one as I say and both innocuous, requiring me to log in an restore / renew my password is, well, just a Norton hindrance.
Thanks again for your help however and your advice did get my attention at the time.