Hi, yes they will sit another NFER test around February time. It is, as far as I am aware, a verbal reasoning paper although it is marked by school. Not sure on state primary schools, our daughter was at an independent so they could sit it when they felt the time was right. He would have done the original NFER in February of last year. They are normally looking for scores of 117 and over perhaps you remember them telling you scores at your parents evening.
You will receive all your info with regard to appeals process on allocation day you cannot appeal before all places have been issued. You will have probably seen on the letter from the authority that you CANNOT put down as first choice your grammar school! You must put down the first choice of comprehensive otherwise you may find that they give you your third choice!! Be wary of this!! I know it can be different in other areas.
You must obtain a copy of the IAB letter from your head they should have kept a copy of this! That will show his recent SATs levels reading and spelling age and any additional information the school put down as to the reason he missed by one point!!
Your appeal letter will need to be submitted by the 31st March! Hearings are normally May time. You will need to show hopefully that he has improved his SATs levels and also his reading and spelling age and what his recent NFER level is and what percentile he was working at at school at the time of the test. If you can get the school to give him regular SATs papers then this will help. You can take these with you on the day to submit as evidence as long as they are clearly marked by the teacher and show what level he has obtained.
Most important though is that you have a letter from the head echoing everything that you have said!! The letter must not be vague you want them to be strongly recommending that he is offered a place and listing everything that you have said in yours. They want academic evidence all the way and unfortunately what we say is not grounds enough they want the school back up!! You can mention his qualities as in sports and what type of person he is and his outside interests but don't go overboard on waffle!! It's so easy to get caught up in it!! Stick to the facts and academia!!!
Like I say if you want to have a chat to me before you do letter just let me know!! They are certain words they do not like to see like "deserve" but can go through that nearer time. Have a look on this website with regard to appeal letters questions etc!! It's quite helpful but I am not going to lie to you! It goes out the window when you are in that room fighting for your child!!! It becomes lioness mode!!
Good luck keep me posted like I say you need a sounding board let me know ***