Admit that school league tables are a farce - some children are not academic (wash my mouth out with soap) - yes, the grammar school system had its failings, but the principle is good of everyone being able to either go the academic route or learn a "trade" (which may be manual eg plumbing, electrician, hairdressing etc or may be white collar eg customer service work, retail, travel - equip people for a career). Rather than a one-off exam at 11, the child's whole personality and aptitudes should be taken into account, and they should be allocated a secondary school, in discussion with the parents, accordingly to focus on academic subjects, practical qualifications.
We currently have this ridiculous situation of unsporting children going to a specialist sports college, because it is the local catchment school and they won't get in elsewhere, and likewise the sportingly gifted children not getting in because they are out of catchment! (Same re arts, technology etc)
By the way, if you work in plumbing/travel/retail/catering I am not suggesting that you are in any way less bright than if you don't, just that they are industries where you could get to a certain level by being trained well, you don't have to be bright though you obviously could go further quicker if you are. I'm not wording this very well here - I'll shut up and go and make a soup!