After delving deeper into why the cformsII plugin would not install using the auto update.What I first thought were a load of different errors actually related to write permissions (or so I thought).

I CHMOD the cformsII directory and subdirectories to 777 using FileZilla (allow writing etc) and tried the auto update again only to find that it still would not update.The final error message being could not create directory cforms.

Well not being the most patient of people I have this morning deleted the cformsII plugin and done a complete upload and reinstall.

Well touch wood all seems well I am now running cformsII (8.6) with no issues.I am going to give it a day then I am going to update my other sites using the same method.