I've hassled the amazing UncleCheese for the code discussed earlier... I've now made a simple rendering straight away with it... I'm now attaching it here to this thread for all interested parties (Note - I have done the most basic html example only).
some notes from UncleCheese
"90% of the work in PDF to HTML conversion, in my experience, is HTML and CSS pixel pushing. It's a lot like designing an email template, only with even less tolerance of standards. You've got to use a lot of tables for layout, presentational attributes, and all kinds of circa 2002 markup to get it right. It's a struggle."
"the embedded CSS.. there are a couple key properties like "page-break-before: always;" which is important for multi-page PDFs (HTML doesn't understand the concept of page breaks..)"
I haven't gone through this step - just the initial use of the code to render simple HTML page.
(note I have only included the basic example and none of my or UC css/templates)