This is more a WWYD.
If you suspected someone had fraudulently applied for a secondary school place, would you report it?
There is a very outside chance of an EHCP but it is unlikely.
I suspect that they've used a different address to their actual address when applying.
They live approx 6 miles from the school. According to the local authority data, the furthest place offered was 1.2m from the school.
Would you report it or just mind your own business?