I would like to know if there is any way to ask a Grammar school to consider a child for admission without the school being mentioned in the CAF form, given that the child has taken and passed the test. Has anyone had this kind of experience before and how does it work?
Looking at the guide for completing the CAF in our area, it may be possible to make changes to one's CAF after the closing date, by contacting the LEA by phone. However, I think any new applications made now - i.e. substituting a new preference for one previously made, or adding a new school to the list if you didn't fill all your options before - would be regarded as a late application and would probably only be dealt with after National Offer Day, unless the change was being made because of e.g. a house move and the Admissions team can be convinced that you couldn't reasonably have made the application on time.
If your application is treated as 'late', unless the school is undersubscribed, your child would be placed on the waiting list in the position dictated by the school's oversubscription criteria.