I successfully appealed for my ds who passed the test but missed the cut off for a super-selective so it’s not entirely true that “the cut off is the cut off”. He’s now doing very well and making the most of it. He takes part in many sporting events and school activities, and he’s currently in the top set for Maths.
The journey to appeal is indeed a long one but you can start your groundwork and research now if you put your mind to it. Between October and March my ds put in the extra effort in class (Y6) for the weakest subject component of the test so that by April when I started gathering evidence, his teacher wrote a strong letter of support including special mention of his rapid progress in that subject, in case the appeal panel question me about the (weak) subject.
The "cut off" criteria is already applied as part of the admissions process so that part is done at that stage - the appeal panel will not use the hearing to just scrutinise exactly how many points he missed. The appeal hearing is a chance for you to present alternative academic evidence along with any evidence of issues on the day of the 11+ test, depending on your grounds of appeal and these will be the main focus.
1 point is a near miss and borderline. Just one more question answered correctly and he’d instantly become gs material, right? I know of children who missed by a much wider margin; 8 points and 12 points (for super-selectives) and they’re now thriving at gs. The stronger and more overwhelming evidence you can provide the more you can justify the shortfall in marks. Check if his school did the CAT test. If the school you’re appealing for has a specialism say in Music or Science then provide evidence to show he’s interested and active in these areas, e.g. plays the clarinet etc or an active member of the junior Science Club, if possible, and it is the nearest gs providing that specialised and inspiring environment to help him realise his full (musical…) potential. It also works both ways so think about how your ds will contribute positively to the school in return.
Please don’t hire a lawyer as it’s really off putting. You’re not going into a hearing to fight a battle. Many parents get over emotional during the hearing. Some try too hard, and are overzealous and over-rehearsed e.g. “Oh my son is totally gs material, he’s amazing and therefore he deserves a place here…”. Keep it simple and positive. The appeals panel in general are nice and understanding.
Whatever the outcome, it’s still worth trying and I wish you all the very best.