I'm sorry that you find yourself in this position, and will help if I can, based on my experiences last year, but I think that you will need to clarify with wirral to be sure about how they are treating the review.
Last year children who were referred to the IAB were effectively barred from appealing on academic grounds - section 3.37 of the admissions code says
Where a local review process has been followed, the panel must not make its own assessment of the child's ability, but must consider whether each child's review ws carried out in a fair, consistent and objective way eg whether the same type of evidence was used in all cases. If there is not evidence that this has been done, it must follow the process in paragraph 3.36
3.36 is a 'normal' appeal.
Did you let the school formally know by 12th December that there were factors affecting your daughter? If so, were they included in the reveiw. If not, then you may have grounds for saying that 3.37 was not applied fairly and you can then appeal on academic grounds.
I have to say that the ombudsman's review of the procedures followed by Wirral last year was rather scathing and ran to 5 pages. Appeals had to be carried out again. I would be happy to e-mail a copy of this document to anyone who finds themselves up against the same problem this year in Wirral, if that is ok with the moderators for people to pm me? (And if you think it would help!)