September 2026: Ofsted adds a similar schools comparison to the IDSR
From September 2026, your inspection data summary report (IDSR) includes a new "versus similar school average" comparison, sitting alongside the existing comparison against the national average.
Instead of just comparing your school against the national picture, it compares it against a group of around 50 schools with a similar context – covering the main attainment and progress measures at Key Stage 2 for primary schools and Key Stage 4 for secondary schools.
There's nothing you need to do to access it – it's built into your IDSR automatically, and you view it the same way you already do, through Ofsted's IDSR service or DfE's Analyse School Performance (ASP) service.
Take a look at