Thank you all.
I have been setting everything up with page breaks, but when reading back a book there was a blank page - I assumed that this was because the pages I was editing were of a different size to the reader. I have since found out it is because there were a couple of blank lines at the end of the chapter. Fortunately this is something I have been cropping out in my more recent editing...
The last book I tried to convert (using calibre) to LRF failed with a load of errors. Being that the book was just text, I didn't care...
If I need images or anything later, I will look into the problem I had with converting.
Again, thank you all
