| 1 | Wilson's School | 93.8 compositeOfsted28.3 Att832.2 EM5+33.3 | Grammar · Day · 6th | Wallington, London | Outstanding 2022-09-28×0.85 |
| 2 | The Tiffin Girls' School | 93.1 compositeOfsted28.3 Att831.6 EM5+33.1 | Grammar · Day · 6th | Kingston upon Thames, London | Outstanding 2021-10-13×0.85 |
| 3 | Queen Elizabeth's School, Barnet | 93.0 compositeOfsted28.3 Att831.7 EM5+33.0 | Grammar · Day · 6th | Barnet, London | Outstanding 2022-05-17×0.85 |
| 4 | Newstead Wood School | 92.3 compositeOfsted28.3 Att830.7 EM5+33.3 | Grammar · Day · 6th | Orpington, London | Outstanding 2022-02-02×0.85 |
| 5 | St Michael's Catholic Grammar School | 89.2 compositeOfsted28.3 Att828.8 EM5+32.0 | Grammar · Day · 6th | London, London | Outstanding 2022-11-09×0.85 |
| 6 | Bexley Grammar School | 88.7 compositeOfsted28.3 Att827.7 EM5+32.7 | Grammar · Day · 6th | Welling, London | Outstanding 2022-10-18×0.85 |
| 7 | Townley Grammar School | 88.4 compositeOfsted28.3 Att827.8 EM5+32.3 | Grammar · Day · 6th | Bexleyheath, London | Outstanding 2023-02-28×0.85 |
| 8 | The Henrietta Barnett School | 86.9 compositeOfsted21.2 Att832.3 EM5+33.3 | Grammar · Day · 6th | London, London | Good 2022-05-04×0.85 |
| 9 | Twyford Church of England High School | 85.5 compositeOfsted33.3 Att824.9 EM5+27.3 | Academy · Day · 6th | London, London | Outstanding 2023-10-17 |
| 10 | Lady Margaret School | 85.1 compositeOfsted33.3 Att824.6 EM5+27.2 | Academy · Day · 6th | London, London | Outstanding 2023-11-22 |
| 11 | Sutton Grammar School | 84.1 compositeOfsted21.2 Att829.7 EM5+33.1 | Grammar · Day · 6th | Sutton, London | Good 2022-06-22×0.85 |
| 12 | Nonsuch High School for Girls | 84.0 compositeOfsted21.2 Att829.8 EM5+32.9 | Grammar · Day · 6th | Sutton, London | Good 2021-05-25×0.85 |
| 13 | The Latymer School | 83.9 compositeOfsted21.2 Att829.7 EM5+33.0 | Grammar · Day · 6th | London, London | Good 2022-03-24×0.85 |
| 14 | Woodford County High School | 83.9 compositeOfsted21.2 Att829.7 EM5+33.0 | Grammar · Day · 6th | Woodford Green, London | Good 2022-11-22×0.85 |
| 15 | Ark Greenwich Free School | 83.7 compositeOfsted28.3 Att825.3 EM5+30.1 | Free School · Day | London, London | Outstanding 2023-04-25×0.85 |
| 16 | Tiffin School | 83.3 compositeOfsted21.2 Att829.3 EM5+32.8 | Grammar · Day · 6th | Kingston upon Thames, London | Good 2022-05-24×0.85 |
| 17 | Ilford County High School | 81.7 compositeOfsted21.2 Att828.0 EM5+32.4 | Grammar · Day · 6th | Ilford, London | Good 2021-09-21×0.85 |
| 18 | Ashcroft Technology Academy | 81.2 compositeOfsted28.3 Att824.7 EM5+28.2 | Academy · Day · 6th | London, London | Outstanding 2021-09-21×0.85 |
| 19 | Beths Grammar School | 80.4 compositeOfsted21.2 Att826.5 EM5+32.6 | Grammar · Day · 6th | Bexley, London | Good 2022-05-04×0.85 |
| 20 | The Cardinal Vaughan Memorial RC School | 80.0 compositeOfsted28.3 Att824.9 EM5+26.7 | Academy · Day · 6th | London, London | Outstanding 2021-11-16×0.85 |
| 21 | The Grey Coat Hospital | 79.3 compositeOfsted28.3 Att824.7 EM5+26.3 | Academy · Day · 6th | London, London | Outstanding 2022-10-04×0.85 |
| 22 | Gunnersbury Catholic School | 78.8 compositeOfsted28.3 Att823.5 EM5+26.9 | State · Day · 6th | Brentford, London | Outstanding 2023-01-17×0.85 |
| 23 | The Charter School North Dulwich | 78.6 compositeOfsted28.3 Att824.1 EM5+26.2 | Academy · Day · 6th | London, London | Outstanding 2022-06-07×0.85 |
| 24 | Graveney School | 78.2 compositeOfsted28.3 Att823.7 EM5+26.2 | Academy · Day · 6th | London, London | Outstanding 2022-11-30×0.85 |
| 25 | Ada Lovelace Church of England High School | 78.1 compositeOfsted28.3 Att823.9 EM5+25.9 | Free School · Day · 6th | London, London | Outstanding 2023-01-11×0.85 |