| 1 | Queen Elizabeth's School, Barnet Period 202122 | 55.8 | Grammar · Day · 6th | Barnet, London | Outstanding |
| 2 | Wilson's School Period 202122 | 55.1 | Grammar · Day · 6th | Wallington, London | Outstanding |
| 3 | St Olave's and St Saviour's Grammar School Period 202122 | 54.2 | Grammar · Day · 6th | Orpington, London | — |
| 4 | Tiffin School Period 202425 | 52.4 | Grammar · Day · 6th | Kingston upon Thames, London | Good |
| 5 | Sutton Grammar School Period 202223 | 51.4 | Grammar · Day · 6th | Sutton, London | Good |
| 6 | Wallington County Grammar School Period 202425 | 48.1 | Grammar · Day · 6th | Wallington, London | — |
| 7 | The St Thomas the Apostle College Period 202223 | 47.9 | State · Day · 6th | London, London | — |
| 8 | The London Oratory School Period 202122 | 47.5 | Academy · Day · 6th | London, London | Outstanding |
| 9 | St Joseph's College Period 202122 | 47.5 | Academy · Day · 6th | London, London | Good |
| 10 | Norlington School and 6th Form Period 202425 | 47.3 | Academy · Day · 6th | London, London | — |
| 11 | The Cardinal Vaughan Memorial RC School Period 202122 | 46.4 | Academy · Day · 6th | London, London | Outstanding |
| 12 | Hasmonean High School for Boys Period 202122 | 45.7 | Academy · Day · 6th | London, London | Good |
| 13 | Ilford County High School Period 202122 | 44.3 | Grammar · Day · 6th | Ilford, London | Good |
| 14 | Harris Boys' Academy East Dulwich Period 202425 | 43.9 | Academy · Day · 6th | London, London | Outstanding |
| 15 | St Bonaventure's RC School Period 202122 | 43.5 | State · Day · 6th | London, London | Outstanding |
| 16 | Mulberry Stepney Green Mathematics and Computing College Period 202122 | 43.5 | Academy · Day · 6th | London, London | — |
| 17 | Carshalton Boys Sports College Period 202122 | 43.0 | Academy · Day · 6th | Carshalton, London | Good |
| 18 | Rutlish School Period 202223 | 42.7 | State · Day · 6th | London, London | — |
| 19 | Gunnersbury Catholic School Period 202122 | 42.3 | State · Day · 6th | Brentford, London | Outstanding |
| 20 | The Fulham Boys School Period 202223 | 41.6 | Free School · Day · 6th | London, London | Good |
| 21 | Finchley Catholic High School Period 202122 | 41.1 | State · Day · 6th | London, London | — |
| 22 | Isleworth and Syon School for Boys Period 202223 | 41.1 | Academy · Day · 6th | Isleworth, London | Good |
| 23 | Langley Park School for Boys Period 202122 | 40.9 | Academy · Day · 6th | Beckenham, London | — |
| 24 | The Campion School Period 202122 | 40.4 | Academy · Day · 6th | Hornchurch, London | — |
| 25 | Central Foundation Boys' School Period 202223 | 40.3 | State · Day · 6th | London, London | — |