| 1 | Crosfields School Period 202425 | 69.9 | Independent · Day | Reading, South East | — |
| 2 | Claremont Fan Court School Period 202425 | 68.6 | Independent · Day · 6th | Unknown, South East | — |
| 3 | Sherfield School Period 202425 | 66.3 | Independent · Boarding · 6th | Hampshire, South East | — |
| 4 | Meoncross School Period 202425 | 65.1 | Independent · Day | Unknown, South East | — |
| 5 | d'Overbroeck's Period 202425 | 64.8 | Independent · Boarding · 6th | Oxford, South East | — |
| 6 | Sevenoaks School Period 202324 | 61.2 | Independent · Boarding · 6th | Sevenoaks, South East | — |
| 7 | OneSchool Global UK - Maidstone Campus Period 202425 | 61.1 | Independent · Day · 6th | Maidstone, South East | — |
| 8 | The Webber Independent School Period 202425 | 61.1 | Independent · Day | Unknown, South East | — |
| 9 | Downsend School Period 202425 | 61.0 | Independent · Day · 6th | Leatherhead, South East | — |
| 10 | Lewes Old Grammar School Period 202425 | 60.4 | Independent · Day · 6th | Unknown, South East | — |
| 11 | Long Close School Period 202425 | 60.4 | Independent · Day | Slough, South East | — |
| 12 | Ditcham Park School Period 202425 | 59.9 | Independent · Day | Petersfield, South East | — |
| 13 | St Gabriel's School Period 202425 | 59.7 | Independent · Day · 6th | Berkshire, South East | — |
| 14 | Charterhouse Period 202425 | 58.5 | Independent · Boarding · 6th | Godalming, South East | — |
| 15 | OneSchool Global Reading Senior Campus Period 202425 | 58.0 | Independent · Day · 6th | Unknown, South East | — |
| 16 | Brighton College Period 202425 | 57.9 | Independent · Boarding · 6th | Brighton, South East | — |
| 17 | Gad's Hill School Period 202425 | 57.3 | Independent · Day | Rochester, South East | — |
| 18 | Shoreham College Period 202425 | 56.1 | Independent · Day | Unknown, South East | — |
| 19 | The King's School Period 202425 | 54.8 | Independent · Day | Witney, South East | — |
| 20 | The King's School Canterbury Period 202122 | 54.0 | Independent · Boarding · 6th | Canterbury, South East | — |
| 21 | St Joseph's College Period 202425 | 52.4 | Independent · Day · 6th | Unknown, South East | — |
| 22 | Radnor House Sevenoaks Period 202425 | 52.2 | Independent · Day · 6th | Unknown, South East | — |
| 23 | Dunottar School Period 202425 | 51.6 | Independent · Day · 6th | Reigate, South East | — |
| 24 | OneSchool Global UK - Hindhead Campus Period 202425 | 50.9 | Independent · Day · 6th | Hindhead, South East | — |
| 25 | Stowe School Period 202223 | 49.5 | Independent · Boarding · 6th | Buckingham, South East | — |