I have to agree with Hyacinth but I suspect it falls on deaf ears. Having experienced both a Grammar school and an Upper school I actually prefer the Upper my DC are attending ( same DC in one case). It is strict they are expected to do homework but my Y8 DC finds that easily manageable. My GCSE DC gets a lot obviously but the DC are able to go to after school sessions to complete coursework, do revision and get general help. This is all possible because he can walk home from school. In fact if I pick him up ( 5 mins in the car) he arrives home from an after school revision session the same time as the Grammar school buses are dropping off. Makes getting those A grades he's after so much easier
In a nutshell there are some excellent Grammars out there but so are there other schools doing just as good a job without the additional travel implications. My youngest is insistent that he wants to try to go to our local
Grammar school but I personally would be much happier if he went to our local Upper because he can walk. I know all schools are different and our experience of a Grammar may have been unique but I would want to have had a lot of unbiased personal reviews on any Grammar I wished my DC to attend if they were expected to undertake a long and possibly disruptive journey every day. This is why DC have left the schools as DP realise they are not the be all and end all and certainly not worth the stress involved in the travel.
Unfortunately despite all the advice given on this site only once their DC has started does the penny drop. Worse removing their DC means their DC now has start at a new school once induction activities have already taken place and friendship groups made, doable but not preferable. In addition they have inflicted this on some poor local DC who was denied a place at their local school initially because of the decision to take on a ridiculous journey with out considering their own DC's needs.
If your local school is not acceptable then the sensible thing to do is relocate.