Well I've solved the issue (I think).

The word count (or similar) was too high.

I decided to try and post the required thread info into this forum and ask for it to be transferred over to the correct area, but when I tried I got the exact same response - Your thread is awaiting approval.

So I created a new thread in the Map Making Forum and when this worked without issue I copied the text over in small chunks.

I don't know if it would be possible, but maybe if you could add information about this quirk into the FAQs or similar it would be a great help for the next person.

Issue resolved -Thread can now be closed.