.... Just to let you know, I picked up some Lactulose and it worked a treat, along with putting her back on stage 1 and I have NEVER been so happy to be greeted by a baby absolutely covered, head to toe, in bright yellow, seedy poo!
She was covered in poo, but she was smiling, not screaming!! 
:o
Thanks.
And much resepect to all those of you who have been/are enduring this type of thing long term. :( It is truly awful.
Hope that's it for DD for the time being.