I know you aren't asking this question, but thought I'd mention our experience of catchment vs village school. I stay a couple of streets away from my SIL and we have dc 10 weeks apart. We both stay in a new build estate and the catchment school is in the neighbouring estate which is classed as a deprived area, well known due to TV for all the wrong reasons, but I was new to area so that was my only impression. There is a village a couple of miles in the opposite direction with a small village school. SIL/BIL and dh/I initial thoughts were village school, smaller classes, less children in classes, better socially etc We both (separately) visited both schools.
Dh and I unexpectedly found the headmaster at the catchment school very inspiring and felt an instant good buzz about the place. Lots of what the headmaster said about learning and pastoral care really hit home. I openly asked him about the areas reputation, our concerns and how we were discussing the small village school and he explained the differences in the type of schooling and school experience and to be aware if ds had no particular needs (other than being very shy) to be in a small school, it wasn't good preparation for going to a large secondary. The deputy head then showed us around into classes being taught, she spent a good hour with us. Both very visibily proud of their school.
The Village school was very small and just lacked oomph, ht felt dismissive and couldn't wait to get rid of us..
We decided to send ds to the catchment school and he thrived there. Brilliant culture, lots of friends, top sets for most things and is now thriving in secondary. He also had lots of local school friends he could just go out and play with in our estate.
SIL/BIL chose to send my niece to the village school instead. School and teaching was fine, but she found it difficult. Villages can be very cliquey when it comes to parties and play dates. If dn fell out with a friend there are no other friends to move too as the group was so small. SIL, who is very likeable, took a role on the PTA to try to fit in, everyone was naice to their faces but they were still never included in parties etc. Lots of tears over the years from dn and she also never made many local school friends she could play out with. When dn went to the same large 700+ pupil secondary it took a long time to adjust to the, relatively speaking, huge classes.
Make sure you do your homework and visit both before choosing either school, a small school might sound good ideally and may be the best option but not always as there are negatives too. A lot will depend on how good the heads are and whether other parents make you feel welcome.
For placement requests we were told you register at your catchment school in January iirc and put a placement request for the other school.