A very popular school in my area had a complaint against its 2019 admissions policy upheld by the Schools Adjudicator. Because of the timing of the judgement, they were told to make just some minor changes to the explanatory notes of their 2019 policy, but they didn't. They were also meant to make some more significant changes to their 2020 policy, but to do that they would have needed to consult and they haven't. They should have also published the 2020 policy by now, but haven't.
What happens if a school just ignores the adjudicator's decision?