- Source
- UK Department for Education (DfE) 2025 KS4 and KS5 school performance data.
- Composite formula
- Composite = A-Level weighted 70% + GCSE weighted 30%. Each indicator is normalized to a 0–100 scale (A-Level out of 60, GCSE out of 90).
- A-Level sort key
- Based on KS5 Average Point Score (per-student average per A-Level subject, where A* = 60 points).
- GCSE sort key
- Based on KS4 Attainment 8 (average of a student's best results across 8 core subjects).
- Coverage
- Currently lists English independent schools with published DfE data. Scottish, Welsh and Northern Irish schools sit on different qualification systems; data integration is in progress.
- Data update
- Rankings reflect the 2024-25 academic year, released by DfE in late 2025.