The brown sugar and water helped here...

The other thing, do you stand there and watch her go to the toilet? Charlotte went through a phase of "back in a minute mummy" where she wouldn't do a poo while I was standing there, I had to be out of sight lol Maybe she is getting a bit like that?

Prunes will definitely help though, I would go and grab some, I put a couple on her porridge every morning, just chop them up, also means I don't have to add honey or sugar to her porridge