..schools MUST NOT: ....
f) take account of reports from primary or nursery schools about children's past behaviour, attendance, attitude or achievement;
Given the potential for discrimination, admissions authorities may only use supplementary application/information forms that request additional information when it has a direct bearing on decisions about acceptable oversubscription criteria...
Schools Admissions Code Sections 2.13 and 1.73
It would seem that this is definitely not good practice and parents might wish to ask the Local Authority to take it up with the school.
Yes, I would recommend this course of action too, especially to anyone needing to appeal for a place. It is ludicrous for the schools to say they are only asking for this information because parents like to give it, and that they don't use it when considering admissions.