” … the report, which looks at 429 council-run schools rated as inadequate in 2013, found that 115 (75 per cent) of 152 schools that stayed with the council became good or outstanding by 2017. …
Meanwhile, only 92 (59 per cent) of the 155 schools that had been inspected since becoming sponsored academies saw their Ofsted ratings improve to good or outstanding during that period. …”