Many thanks for the input. At least that tells me there may be a problem at my end.
I wonder if there is something in the install DNN4less are providing me. I am having the no-Telerik version.
Any thoughts as to where I may look? I have already checked the CKeditor parameters and no matter whether I select Relative or Absolute I get the full link.
Is there anything in the web.config of CKEditor provider that may be impacting this?