Prh: "A teacher may not teach intelligent design or creationism as fact"
I agree, that is clear.
"How much clearer does it need to be"
Given that we're going round in circles on this, it does need to be clearer.
"If the stories were consistent and appeared to stack up Ofsted should take them seriously."
The OP's story so far is that "Intelligent Design seems to be taught in Science". If that is the correct interpretation of what is being taught in class, and others have the same story, then yes, Ofsted will take it seriously.
However, my point all along has been that the OP's daughter may be hearing Theistic Evolution opinions (which is par for the course in any faith school, and isn't in breach of the rules), and wrongly interpreting it as ID.
I suggested that the OP should carefully explain the difference to her daughter, and, in the light of that, discuss with her exactly what has been said. If she is still convinced that Intelligent Design is being taught in science lessons then she should escalate it.