I think it would be best if I wrote to the noble Baroness as I do not have the figures directly to hand.
The academy trust structure also brings greater autonomy with a strong accountability framework. International evidence has shown this drives up standards. Academies operate under a robust accountability framework under which we are able to hold the trust directly to account for their school improvement and we have clear routes to intervene should concerns arise. We would not have the same robust accountability if a maintained school or a local authority took over responsibility for a failing school.
It is also not just about the freedoms and stronger accountability, though; it is also about some of the substantial advantages of operating in a multi-academy trust, which the noble Baroness, Lady Sharp, identified. It is acknowledged that the best way to improve schools is through local school-to-school support, and the best, most rigorous, efficient and accountable way to do that is through such a multi-academy trust. People who run multi-academy trusts talk about the advantages of the freedoms, the sense of being in control of one’s own destiny, the career opportunities as people are employed across a group of schools, the ability to retain good staff and, crucially, the ability to share best practice. They talk about leadership development, the enhanced CPD and, on the operational side, the economies of scale and purchasing power of being in a MAT. They talk about the ability to have common school improvement, behaviour management systems, a common curriculum, common teaching pedagogy and systems and the limitless benefits of pupils moving from primary to secondary when a MAT has both types of school in its family.