I used to write, review and apply admissions policies as part of my day job. I also used to clerk the appeals process for an academy, which basically means I was on hand to advise the appeal panel on matters relating to the appeal process itself and the law on admissions. Although my experience is secondary, the rules are broadly similar and the principles are common to secondary and primary phase (and middle where this applies) Get a copy of the school's and/or local authority's admissions policy, along with the date that it was last reviewed. Check that the selection and over-subscription criteria have been applied properly and fairly. If you want help with an appeal I am happy to do what I can to advise you, but first I would need to see the policy, and the letter you received offering a place. Send these via PM or email if you want me to look at them.