| 1 | Queen Elizabeth's School, Barnet | 76.5 composite | Grammar · Day · 6th | Barnet, London | Outstanding 2022-05-17×0.85 |
| 2 | Wilson's School | 73.3 composite | Grammar · Day · 6th | Wallington, London | Outstanding 2022-09-28×0.85 |
| 3 | Tiffin School | 63.6 composite | Grammar · Day · 6th | Kingston upon Thames, London | Good 2022-05-24×0.85 |
| 4 | Sutton Grammar School | 61.0 composite | Grammar · Day · 6th | Sutton, London | Good 2022-06-22×0.85 |
| 5 | Harris Boys' Academy East Dulwich | 60.9 composite | Academy · Day · 6th | London, London | Outstanding 2023-11-28 |
| 6 | Gunnersbury Catholic School | 58.6 composite | State · Day · 6th | Brentford, London | Outstanding 2023-01-17×0.85 |
| 7 | The London Oratory School | 57.1 composite | Academy · Day · 6th | London, London | Outstanding 2022-09-13×0.85 |
| 8 | The Cardinal Vaughan Memorial RC School | 56.2 composite | Academy · Day · 6th | London, London | Outstanding 2021-11-16×0.85 |
| 9 | Hasmonean High School for Boys | 56.2 composite | Academy · Day · 6th | London, London | Good 2023-11-07 |
| 10 | St Bonaventure's RC School | 55.2 composite | State · Day · 6th | London, London | Outstanding 2022-11-29×0.85 |
| 11 | St Olave's and St Saviour's Grammar School | 51.5 composite | Grammar · Day · 6th | Orpington, London | — 2024-11-05 |
| 12 | Ilford County High School | 51.5 composite | Grammar · Day · 6th | Ilford, London | Good 2021-09-21×0.85 |
| 13 | Richard Challoner School | 50.1 composite | Academy · Day · 6th | New Malden, London | Outstanding 2022-11-22×0.85 |
| 14 | St Joseph's College | 49.8 composite | Academy · Day · 6th | London, London | Good 2020-02-25×0.7 |
| 15 | Carshalton Boys Sports College | 49.8 composite | Academy · Day · 6th | Carshalton, London | Good 2022-10-18×0.85 |
| 16 | UTC Heathrow | 47.0 composite | Free School · Day · 6th | Northwood, London | Good 2023-02-07×0.85 |
| 17 | Forest Hill School | 46.7 composite | State · Day · 6th | London, London | Good 2023-12-13 |
| 18 | Isleworth and Syon School for Boys | 46.5 composite | Academy · Day · 6th | Isleworth, London | Good 2023-11-14 |
| 19 | The Fulham Boys School | 45.1 composite | Free School · Day · 6th | London, London | Good 2022-10-11×0.85 |
| 20 | Wallington County Grammar School | 44.6 composite | Grammar · Day · 6th | Wallington, London | — 2022-11-16 |
| 21 | Ernest Bevin Academy | 43.7 composite | Academy · Day · 6th | London, London | Good 2022-06-07×0.85 |
| 22 | Beths Grammar School | 41.9 composite | Grammar · Day · 6th | Bexley, London | Good 2022-05-04×0.85 |
| 23 | Southborough High School | 41.3 composite | Academy · Day · 6th | Surbiton, London | Good 2023-02-02×0.85 |
| 24 | Norlington School and 6th Form | 36.5 composite | Academy · Day · 6th | London, London | — 2023-11-30 |
| 25 | The St Thomas the Apostle College | 35.5 composite | State · Day · 6th | London, London | — 2024-11-06 |