Several folk were asking about retention rates for Teach First. There seems to be some confusion here. So, I’m going back to figures submitted to Teach First to the Education Select Committee for their ninth report into attracting, training and retaining the best teachers. You can download it from here. In the second volume, page 216, you’ll find this paragraph:
The University of Buckingham have also published their report into this, and other, issues. Their findings were broadly similar to this and I reported them back in 2012. All this evidence in addition to the work done the DfE themselves. Seems conclusive to me.