Also, in some areas, thanks to families doing this, some DC's end up with NO school place, or one that is impossible to get to.
Simply because families with 3/4 DC's rent one of the 1-bed flats right next to the school, for the duration of applications.
So someone who isn't in the catchment for any other school, but is right on the outskirts of the catchment for the school where large families have rented an unfeasibly small flat end up with either no school place at all, or one that is the next closest 'as the crow flies' (how our LA determines admission distances), but is too far to walk AND is two buses away that with dodgy connections would require you to LEAVE the house at 6.45am to get there for 8.35.
It also means 4yo's or 11yo's waiting around for 30 minutes in the town centre for the next bus.
All because someone decided to try to 'play' the system and rent a tiny 1-bed flat for a large family near to the local school.
Thankfully, my LA has got a LOT stricter on this - those flats are now 'blacklisted', and ANY application from them is treated as potentially fraudulent, meaning that practice is almost disappearing.
The issue is that only two secondaries out of 7 in my town have even a 'good' rating from Ofsted. And the GCSE percentages at the other 5 are dire. They are genuinely 'bad' schools, in ALL senses of the word.
Multiple teachers in GCSE years, in and out of SM, name changes, HTchanges, SLT changes, yet still no real improvement, bar one of them.
So we are heading on the way to a 3/4 split if good schools and REALLY bad ones.