Welcome to the forum, Candiamo.

It would probably be best to wait for the actual outcome rather than agonise over what it might be - but, if pressed, I would tend to agree with Guest55 on the information available.
Last year only 7% of cases at review succeeded with a score of 111. Whether or not a case succeeds depends, of course, entirely on what evidence there is.
Looking at Y2-3, your son's Y3 levels are what the review panel would probably like to see at the end of Y2.
Looking at Y4-5, I'm not sure anyone outside of Berkshire will know what it all means. Now that we have "assessment without levels", different schools are using different systems.
Are you sure that "5.3" is the same as the old level 5?
As Guest55 suggests, unless this happens to be a partner school, then there is no context for the "2" recommendations.
The NVR of 96 is low. The 122 would be viewed at best as borderline.
Parents often refer to how a sibling has performed, but it's not something that can be taken into account.
Nor can the lack of tutoring. (How would one prove a negative?)
Only the review panel can give you a definitive answer, but there are several things they might point to if they wanted to turn down your case - the lack of GDS (greater depth) for Writing, for example.
If you believe grammar school to be the right place for your son, then I think you are absolutely right to challenge the result.
Admittedly, if the review turns out to be unsuccessful, then unfortunately there will be an extra hurdle at the appeal stage.
For further advice, see Section D:
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