Thanks so much for all of your replies!
Funny isn't it - since posting this thread, she has now started a tiny bit of chatter!, not alot but something! She makes sounds and moves her tongue over her lips to make different noises and raises and lowers her voice as well! She started a little bit of repetitive sounds but nothing that you can make out. She just popped out with it the other day and I laughed my head off - cheeky girl! We are still waiting for the nananana/lalalala/mamamama noises (especially mamamama ) but Im sure they will come when she is good and ready!