| 251 | Arnold Lodge School | 469 pupils | Independent · Day · 6th | Leamington Spa, West Midlands | — ISI · Excellent |
| 252 | Mander Portman Woodward School | 563 pupils | Independent · Boarding · 6th | LONDON, London | — ISI · Good |
| 253 | Mander Portman Woodward Independent College | 138 pupils | Independent · Day · 6th | Birmingham, West Midlands | — ISI · Good |
| 254 | Our Lady of Sion School | 314 pupils | Independent · Day · 6th | West Sussex, South East | — ISI · Good |
| 255 | St Edmund's School Canterbury | 618 pupils | Independent · Boarding · 6th | Canterbury, South East | — |
| 256 | Ampleforth College | 404 pupils | Independent · Boarding · 6th | York, Yorkshire and the Humber | — |
| 257 | St Gabriel's School | 469 pupils | Independent · Day · 6th | Berkshire, South East | — |
| 258 | Cundall Manor School | 264 pupils | Independent · Boarding | Unknown, Yorkshire and the Humber | — ISI · Good |
| 259 | Read School | 257 pupils | Independent · Boarding · 6th | Selby, Yorkshire and the Humber | — ISI · Unsatisfactory |
| 260 | Stonar School | 451 pupils | Independent · Boarding · 6th | Wiltshire, South West | — ISI · Good |
| 261 | Shiplake College | 537 pupils | Independent · Boarding · 6th | Henley-on-Thames, South East | — ISI · Good |
| 262 | The King Alfred School | 705 pupils | Independent · Day · 6th | London, London | — ISI · Good |
| 263 | Queen Ethelburga's College | 482 pupils | Independent · Boarding · 6th | York, Yorkshire and the Humber | — ISI · Good |
| 264 | Rookwood School | 269 pupils | Independent · Boarding · 6th | Andover, South East | — ISI · Good |
| 265 | Scarborough College | 572 pupils | Independent · Boarding · 6th | Scarborough, Yorkshire and the Humber | — ISI · Good |
| 266 | Downsend School | 613 pupils | Independent · Day · 6th | Leatherhead, South East | — ISI · Good |
| 267 | Crosfields School | 754 pupils | Independent · Day | Reading, South East | — ISI · Good |
| 268 | RGS Surrey Hills | 350 pupils | Independent · Boarding · 6th | Dorking, South East | — ISI · Good |
| 269 | Silcoates School | 514 pupils | Independent · Day · 6th | West Yorkshire, Yorkshire and the Humber | — ISI · Good |
| 270 | Lime House School | 76 pupils | Independent · Boarding · 6th | Carlisle, North West | — ISI · Good |
| 271 | Farlington School | 411 pupils | Independent · Boarding · 6th | Horsham, South East | — ISI · Good |
| 272 | North Bridge House Senior School | 437 pupils | Independent · Day · 6th | Unknown, London | — ISI · Good |
| 273 | Kensington Park School | 200 pupils | Independent · Boarding · 6th | London, London | — ISI · Unsatisfactory |
| 274 | Michael Hall School | Good | Independent · Day · 6th | Forest Row, South East | Good |
| 275 | Saint Felix School | 244 pupils | Independent · Boarding · 6th | Southwold, East of England | — ISI · Good |