Complex sentence: The school raised over £1.2m during 15 of self regulation until 1st September 2011 when it became one of the first of 22 new Free Schools to open in the UK returning to state funding but independantly managed.
Split into simpler sentences: The school raised over £1.2m during 15 of self regulation. On 1st September 2011 it was one of the frist of 22 new Free Schools to open in the UK returning to state funding but independantly managed.