| 1 | Winchester College | 734 pupils | Independent · Boarding · 6th | Winchester, South East | — ISI · Excellent |
| 2 | Tonbridge School | 803 pupils | Independent · Boarding · 6th | Tonbridge, South East | — ISI · Good |
| 3 | St Paul's School | 1,517 pupils | Independent · Boarding · 6th | London, London | — |
| 4 | Eton College | 1,346 pupils | Independent · Boarding · 6th | Windsor, South East | — ISI · Good |
| 5 | Westminster School | 773 pupils | Independent · Boarding · 6th | London, London | — ISI · Good |
| 6 | Dulwich College | 1,919 pupils | Independent · Boarding · 6th | London, London | — ISI · Good |
| 7 | Sherborne School | 573 pupils | Independent · Boarding · 6th | Sherborne, South West | — ISI · Good |
| 8 | Harrow School | 831 pupils | Independent · Boarding · 6th | Harrow-on-the-Hill, London | — ISI · Good |
| 9 | Radley College | 762 pupils | Independent · Boarding · 6th | Unknown, South East | — ISI · Good |
| 10 | Abingdon School | 1,266 pupils | Independent · Boarding · 6th | Abingdon, South East | — ISI · Excellent |
| 11 | Loughborough Grammar School | 789 pupils | Independent · Boarding · 6th | Loughborough, East Midlands | — ISI · Good |
| 12 | Dulwich Prep & Senior | 812 pupils | Independent · Boarding | Unknown, London | — ISI · Good |
| 13 | Warwick School | 1,250 pupils | Independent · Boarding · 6th | Warwick, West Midlands | — ISI · Good |
| 14 | Bedford School | 1,070 pupils | Independent · Boarding · 6th | Bedford, East of England | — ISI · Good |
| 15 | Whitgift School | 1,517 pupils | Independent · Boarding · 6th | Unknown, London | — ISI · Good |
| 16 | Reed's School | 838 pupils | Independent · Boarding · 6th | Cobham, South East | — ISI · Good |
| 17 | Bruern Abbey School | 222 pupils | Independent · Boarding · 6th | Bicester, South East | — ISI · Good |
| 18 | Slindon College | 112 pupils | Independent · Boarding · 6th | Arundel, South East | — ISI · Good |
| 19 | Abrar Academy | 73 pupils | Independent · Boarding · 6th | Preston, North West | — ISI · Unsatisfactory |
| 20 | Brooke House College | 105 pupils | Independent · Boarding · 6th | Market Harborough, East Midlands | — ISI · Good |
| 21 | Madinatul Uloom Al Islamiya School | Requires Improvement | Independent · Boarding · 6th | Worcestershire, West Midlands | Requires Improvement |
| 22 | The British Muslim School | Requires Improvement | Independent · Boarding | West Midlands, West Midlands | Requires Improvement |