Welcome - you've come to the right place.
Do read the Q and A for lots of information.
Have you read the Q&As yet, Macca?http://www.elevenplusexams.co.uk/appeal ... ed-school/
What advice is given there about how to deal with the school case?
We can see from the DfE data that is available about the school that they often far exceed PAN - sometimes by more than 20. Our question is do we need to prove this to the appeals panel? Should we show evidence of this?
No, you don't need to provide the evidence, as they're very unlikely to deny the figures.
However, you could take the precaution of having with you a printout of the DfE data - just in case it's needed.