The chances of him even remaining friends with his primary school friends is very slim. The high school will be bigger and he may not even be in a form with his primary school friends.
Who ever said you can’t force an 11yo to go to a specific school, of course you can they are 11yo as an adult and the parent you can bloody well tell them what to do!
The problem here is the mother either pandering to him, deliberately being difficult or not thinking of the bigger picture.
Has you DP sat his son down and talked about all the considerations
1 being able to walk to and from school, also meaning he will be able to do more clubs after school because he won’t be relying on pick ups and buses.
2 making new friends he can walk to and from school with more.
3 having more opportunities to hang out with friends after school as he won’t be relying on parents to pick up and needed to rely on public transport. Giving him more independence.
4 the school being bigger the children will be put in forms, he may not even be with his friends, this will include sets too, he may be forced to make new friends anyway but the disadvantage being they will live further away so he won’t get chances of hanging out all the time as he will be spilt between 2 homes and relying on parents to accommodate these friendships.
5 have you looked at what clubs each school offers.
6 is it a school bus or public transport. - lots of bullying happens on school buses. Also will the bus time table be restrictive. My DD goes to a school further away, we choose this school over the local school. The school bus has regularly had issues with fighting and bullying, even though it’s far better rated and better behaved children than other schools in the area. The school bus has 1 bus in the morning and 1 after school. If either bus is missed parents have to pick the child up. If the child wants to do a club, hang out with friends, gets a detention then the parents have to pick up, this is after paying £800 a year for the privilege of a seat on the bus.
We chose a combination of public transport and us doing school pick ups, but we took this into consideration when choosing the school.
I went to a school in another town, the only one from my school, it was so hard having friends out of school as until I was older I never got a chance to hang out with my new school friends. Making friends was great, but I missed out of loads out of school.
On the other hand, my friend made her DD go to a high school last year none of her school friends went to. Luckily it’s closer to her home, she loved meeting new friends and has excelled in the school. We both talked to my friends DD, both my friend and I were the only ones from our primary schools to attend the high school, we met on the first day and been friends for over 30years. So we were able to reassure friends dd how easy it would be and there will be kids just like her.
Also have these conversations been had in a nice civil way with the mum?
Not sure who gets preference but I think I’d absolutely go to court other high school choice as this is setting up your DSS future.