To those of you who read the previous post (which I have deleted,) and commented, thank you for your help.
Ruth, Dot, Marylin and Jude, and Elaine, (there... I've given you all a link)I have discovered the problem and with your help the person concerned has sorted it out.
To those of you who are puzzled, I would just say that if links to my blog appear at the bottom of your comments list, its you who have to 'un -allow backlinks'.
I didn't put the links there, blogger apparently does it automatically.
This led to a misunderstanding and its irksome that I have had to use up blog space to sort it out.