Emz, please keep pushing for counselling as it's vital that she is seen asap. Encourage her to talk and be there for her. It might help if she knew that you had been through the same thing. Talk to her about what happened to you and why you felt he had changed. She needs to know that it was nothing she did, that it was all him. She also needs to know that you will never allow him near her again and that although he is quite obviously a paedo, not all men are like that. Make sure that she has some trusted male contacts such as an uncle that she can spend some time being around so that she can slowly learn to trust again.
She might ask lots of awkward questions such as why she was left alone with him, etc and you need to answer these as honestly as you can, even acknowledging that mistakes were made. Don't think she is too young to understand your feelings or the complex emotions involved, she's been forced to mature in the most horrendous way so please don't hold anything back from her now.
You must be living a nightmare and I'm sure you have a whole heap of guilt yourself, but these people are so good at manipulating us. You may have thought he was only interested in abusing you, or that you were somehow to blame and you also need counselling to deal with that. Remember that he and only he is responsible for his actions. He would have devised circumstances that led to him being alone with your daughter, he would have used threats, he would have abused his position of power and he would have used emotional blackmail, such is the pervertedness of these people and the hold he obviously had over you all.
I hope your mother is standing by you all and has thrown him out.
Your dd needs to know that your family is standing by her and that none of you blame her at all. Keep things normal for her, establish a routine as that will allow her to claw back a little control if she knows exactly what is going to happen every single day.
The school will have a parent liaison officer so ask to speak to them and every child is entitled to around 6 hours of counselling support provided by the school. It's a start so ask about that too, it might fill in the gap before she can be counselled by a specialist.
You need to be phoning social services every day asking what support can be put in place for both your dd and you. You need to ask the Police to talk to your dd and explain what happens from here and to reassure her that he will never be allowed near her again. She needs to know that she is safe in school.
Does she have a best friend that you can invite round? Do that if you can as she might feel better talking to someone her own age and just larking about. Above all, hold her tight, tell her that you love her and that you'll always be there for her. Do that every single day.