It is never the primary school's decision even if they like to make it look like it is. And selecting children in a state primary school for an 11 plus club or suchlike is shocking.
I have a child in year 5. Some parents are going to ask at parents' evening whether or not to enter their child. I learned within the first few weeks of reception not to take into account anything much at all that our school says about my children's academic ability or otherwise. It is a principle which has served me well for over 5 years now.
Make up your own minds.
I fully agree with you mystery. Unfortunately, it does come down to what happens on the actual day. So even if the kids underperform at school but can perform very well on the day, Bob's surely your uncle and vice versa.
Keep going peeps as not long to go now....