fck_image_preview.html has the answer
Found the answer myself.
The Lorum Text Block is in the fck_image_preview.html file.
Simply removing the Text - removes it from the preview of course !!
But its annoying - why is it there in the first place, in an image preview file?
I attach images of "Where" the Files are and "Where" the Code is.
Can't help but think HTML Editors default settings could do with a bit of tidying up.