School only gives most able KS1 harder Reading Comprehension paper

[iamworkingonit]

My child is an average reader with fairly good comprehension. He can make inferences and make valid comments about what he has read. I didn't make a big deal about his year 2 SATS but equally I wanted him to do well.
I work in education and am aware of the expectations for children of this age. I have seen all the year 2 SATS papers and am reasonably confident that my child is working at the level required for a year 2 child.
I asked him how he got on with the various papers and was somewhat disappointed and curious when he told me he did not do the more testing comprehension and reading paper. He said that 3 or 4 children did the paper. He was completely unconcerned about it and I haven't mentioned it to him since.
I have marked some of the comprehension papers at my school and am reasonably sure my child would have got a middling score. He is not highly anxious and could have scored reasonably well. I cannot be sure because he did not do the test. There must be many other children in his class who would have achieved a similar result but have not been given the opportunity to demonstrate their ability.
SATS at year 2 is about to be scrapped and there are many negatives attached to teachers teaching to the test etc. However they do validate (sometimes) teacher's expectations and provide information which is not always expected. The results if used correctly can be used in a flexible and sensible manner to improve and target teaching.
I am not a particularly pushy parent but value education and like all parents want the best for my child. I feel slightly uncomfortable with the fact that most schools except many private schools, would give the reading comprehension papers to all children except for children who are obviously struggling or anxious. If the schools policy is not to give more testing papers to all but a few I would have preferred to know this. I am not entirely sure that I agree with this stance.
I would be interested to hear if this happens in other schools and how others view my concerns.
I have made an appointment to talk to my child's teacher.

"From what I have seen, there is some room for discretion Mrs and if it's not clear cut, the school will be swayed by parental attitude."
Not sure where you've seen it but it's not in the statutory duty laid out in the ARA ...

"The tests are designed to be used with all pupils who have completed the KS1 programme of study and are working at the overall standard of the tests. This means that if pupils are considered to be able to answer the easiest questions, they should be entered for the test. These pupils may not achieve a scaled score of 100, the ‘expected standard’, but should still take the test. "

And "Pupils should be given the opportunity to attempt each test paper. Teachers can use their discretion to decide if pupils need a rest break during any of the tests or whether, if appropriate, to stop the test early."

I'm not debated whether all children should have been given the test. I haven't a clue.

What I am sure of is that in any human endeavour where there is discretion decision makers will be swayed by the attitudes and desires of the people with whom they are dealing.

What I'm saying is if schools fail to follow their statutory duty to administer the tests to every child (able to answer any question) they are breaking the law and libel to prosecution ...it isn't a choice it's a legal obligation

mrz is my dream teacher, knows what she's talking about, always researching and updated with everything, and has profound knowledge of education system. Yet what she says is always sympathetic and loving for all her pupils.
When she says the school need to follow statutory duty, I am sure she does, but with a lot of care and thought into it.