| 26 | Stonyhurst College | 661 pupils | Independent · Boarding · 6th | Unknown, North West | — ISI · Excellent |
| 27 | Nottingham High School | 1,186 pupils | Independent · Day · 6th | Nottingham, East Midlands | — |
| 28 | Eltham College | 1,075 pupils | Independent · Day · 6th | London, London | — ISI · Good |
| 29 | Prior Park College | 563 pupils | Independent · Boarding · 6th | Unknown, South West | — ISI · Good |
| 30 | Alleyn's School | 1,450 pupils | Independent · Day · 6th | London, London | — |
| 31 | The Stephen Perse Foundation | 1,624 pupils | Independent · Boarding · 6th | Unknown, East of England | — ISI · Good |
| 32 | The Leys School | 564 pupils | Independent · Boarding · 6th | Cambridge, East of England | — ISI · Good |
| 33 | Kingston Grammar School | 914 pupils | Independent · Day · 6th | Kingston upon Thames, London | — ISI · Good |
| 34 | Bryanston School | 778 pupils | Independent · Boarding · 6th | Blandford Forum, South West | — ISI · Good |
| 35 | Mill Hill School Foundation | 1,767 pupils | Independent · Boarding · 6th | London, London | — |
| 36 | Eastbourne College | 622 pupils | Independent · Boarding · 6th | Eastbourne, South East | — ISI · Good |
| 37 | Claremont Fan Court School | 1,189 pupils | Independent · Day · 6th | Unknown, South East | — ISI · Good |
| 38 | City of London Freemen's School | 943 pupils | Independent · Boarding · 6th | Surrey, South East | — |
| 39 | Aldenham School | 841 pupils | Independent · Boarding · 6th | Elstree, East of England | — ISI · Good |
| 40 | Caterham School | 1,012 pupils | Independent · Boarding · 6th | Caterham, South East | — ISI · Good |
| 41 | The Portsmouth Grammar School | 1,142 pupils | Independent · Day · 6th | Portsmouth, South East | — ISI · Good |
| 42 | Wells Cathedral School | 734 pupils | Independent · Boarding · 6th | Wells, South West | — ISI · Excellent |
| 43 | Kimbolton School | 1,071 pupils | Independent · Boarding · 6th | Huntingdon, East of England | — ISI · Good |
| 44 | The King's School | 1,139 pupils | Independent · Day · 6th | Chester, North West | — ISI · Good |
| 45 | The Grammar School At Leeds | 2,051 pupils | Independent · Day · 6th | Leeds, Yorkshire and the Humber | — ISI · Good |
| 46 | Dean Close School | 499 pupils | Independent · Boarding · 6th | Cheltenham, South West | — ISI · Good |
| 47 | Emanuel School | 1,108 pupils | Independent · Day · 6th | London, London | — ISI · Good |
| 48 | New Hall School | 1,335 pupils | Independent · Boarding · 6th | Chelmsford, East of England | — ISI · Good |
| 49 | Lancing College | 612 pupils | Independent · Boarding · 6th | Lancing, South East | — ISI · Good |
| 50 | Hymers College | 1,029 pupils | Independent · Day · 6th | Unknown, Yorkshire and the Humber | — ISI · Good |