| 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 | Brampton Manor Academy Period 202122 | 54.7 | Academy · Day · 6th | London, London | — |
| 4 | The Henrietta Barnett School Period 202122 | 54.6 | Grammar · Day · 6th | London, London | Good |
| 5 | The Tiffin Girls' School Period 202122 | 54.4 | Grammar · Day · 6th | Kingston upon Thames, London | Outstanding |
| 6 | St Olave's and St Saviour's Grammar School Period 202122 | 54.2 | Grammar · Day · 6th | Orpington, London | — |
| 7 | Tiffin School Period 202425 | 52.4 | Grammar · Day · 6th | Kingston upon Thames, London | Good |
| 8 | Michaela Community School Period 202324 | 51.9 | Free School · Day · 6th | London, London | — |
| 9 | Sutton Grammar School Period 202223 | 51.4 | Grammar · Day · 6th | Sutton, London | Good |
| 10 | Lubavitch House School (Senior Girls) Period 202122 | 50.2 | Academy · Day · 6th | London, London | Good |
| 11 | JFS Period 202223 | 49.2 | State · Day · 6th | Harrow, London | Good |
| 12 | The Latymer School Period 202122 | 49.1 | Grammar · Day · 6th | London, London | Good |
| 13 | Harrow High School Period 202122 | 49.0 | Academy · Day · 6th | Harrow, London | — |
| 14 | Nonsuch High School for Girls Period 202122 | 48.7 | Grammar · Day · 6th | Sutton, London | Good |
| 15 | The Charter School North Dulwich Period 202122 | 48.5 | Academy · Day · 6th | London, London | Outstanding |
| 16 | Haberdashers' Knights Academy Period 202425 | 48.3 | Academy · Day · 6th | Bromley, London | — |
| 17 | Newstead Wood School Period 202122 | 48.3 | Grammar · Day · 6th | Orpington, London | Outstanding |
| 18 | Wallington County Grammar School Period 202425 | 48.1 | Grammar · Day · 6th | Wallington, London | — |
| 19 | Christ's Church of England Comprehensive Secondary School Period 202223 | 48.1 | State · Day · 6th | Richmond, London | — |
| 20 | Wallington High School for Girls Period 202122 | 48.0 | Grammar · Day · 6th | Wallington, London | — |
| 21 | The St Thomas the Apostle College Period 202223 | 47.9 | State · Day · 6th | London, London | — |
| 22 | JCoSS Period 202122 | 47.7 | State · Day · 6th | New Barnet, London | Good |
| 23 | Mossbourne Community Academy Period 202122 | 47.6 | Academy · Day · 6th | London, London | Outstanding |
| 24 | Paddington Academy Period 202122 | 47.6 | Academy · Day · 6th | London, London | Outstanding |
| 25 | St Joseph's College Period 202122 | 47.5 | Academy · Day · 6th | London, London | Good |