She got 114/115 which doesn't bode well for an appeal but we are going for one based on her academics ... no mitigating circumstances.
An appeal can succeed on lower scores provided the academic evidence is very persuasive.
Her HT rating is 1:1
That is helpful, but it will depend on how accurate the Head’s recommendations were overall.
Yr 4 CAT scores VR 117, QT 119, NVR 121 and Year 5 VR 125, QT 128 and NVR 135.
I think most panels would recognise a score in the upper 120s as being very good, so the Year 5 scores are encouraging and the Year 4 scores respectable. You might mention that your daughter appears stronger at NVR.
Yr 5 SATS are Maths 5a, English & Science 5b, predicted Yr 6 SATS all 5a (although her class teacher says if they were allowed to give a 6, then she'd get it for Maths).
Good. Confirmation of the latter point in writing would be helpful.
Is it ok if we submit evidence re. the UNsuitability of our local upper school
The panel can only consider the general issue of non-qualification at this appeal. As hermanmunster has said, you need to prove that your daughter is suitable for a grammar school education.