| Feeder School | Numbers |
| Alleyn's School | 1 |
| Arnold House School | 2 |
| City of London School | 2 |
| Diocesan Boys School | 1 |
| Dulwich Prep London | 1 |
| Durston House | 3 |
| Eaton House The Manor | 1 |
| Exeter School | 1 |
| Haberdashers' Aske's School | 1 |
| Hall School | 16 |
| Heath Mount School | 1 |
| Hereward House School | 3 |
| Hill House | 2 |
| Homefield Preparatory School (Sutton) | 1 |
| King's College School Wimbledon | 1 |
| King's House | 1 |
| Latymer Upper School | 1 |
| Milbourne Lodge School | 2 |
| New College School | 1 |
| Newton Prep | 2 |
| Reading School | 1 |
| Shrewsbury House School | 1 |
| St Paul's Cathedral School | 2 |
| St Philip's | 1 |
| Summer Fields | 1 |
| Sussex House | 5 |
| The Academy School | 2 |
| Thomas's Battersea | 1 |
| Trevor-Roberts' | 2 |
| Westminster Cathedral Choir School | 2 |
| Westminster Under School | 64 |
| Wetherby Preparatory School | 5 |