Thanks everyone.
Well I have just installed the airwrap to the cot -thanks for the tip Sacha!
I went into her screaming yesterday during an afternoon nap- she had rolled over onto her tummy and had both legs through the rails up to her bum and couldnt move. Poor love. She is currently alternating front and back sleeping but I feel much better about it with so many positive responses.

Cass, yeah, she is getting to be a big girl, this year is going fast!

Maryx