mosschops - sorry about the dad bit. I should have known better really, my ex his known by his name ttoo and dh is their dad. Rteally sorry.
Re the letter: you could just ask your dd to write what she would like contact to be then leave her to it, don't coerce her or lead her into writing anything. I remember when my dd was about 6 she had loads of questions for xdh and always forgot when she saw him so I told her to write them down. Sadly after telling her that he would phone once a week (as she asked) he has never contacted her since.
If it will put your mind at rest with it being xmas then a quick phone call to the solicitor would probably be best then follow up with a letter after when you have more time to get things straight in your head.