| 276 | Cranford School | 607 pupils | Independent · Day · 6th | Wallingford, South East | — ISI · Good |
| 277 | Priory School | 361 pupils | Independent · Day · 6th | Unknown, West Midlands | — ISI · Good |
| 278 | Guildhouse School | 163 pupils | Independent · Boarding · 6th | London, London | — ISI · Good |
| 279 | Ashbourne College | Outstanding | Independent · Day · 6th | London, London | Outstanding |
| 280 | Pitsford School | 220 pupils | Independent · Day · 6th | Northampton, East Midlands | — ISI · Unsatisfactory |
| 281 | David Game College | 314 pupils | Independent · Boarding · 6th | Unknown, London | — ISI · Good |
| 282 | The King's School, Gloucester | 714 pupils | Independent · Day · 6th | Gloucester, South West | — |
| 283 | Red House School | 345 pupils | Independent · Day | Stockton-on-Tees, North East | — ISI · Good |
| 284 | Claires Court Schools | 961 pupils | Independent · Day · 6th | Maidenhead, South East | — ISI · Good |
| 285 | The Royal Ballet School | 212 pupils | Independent · Boarding · 6th | London, London | — ISI · Good |
| 286 | Huddersfield Grammar School | 516 pupils | Independent · Day | Huddersfield, Yorkshire and the Humber | — ISI · Good |
| 287 | The Hammond | 258 pupils | Independent · Boarding · 6th | Chester, North West | — ISI · Good |
| 288 | Bedford Greenacre Independent School | 733 pupils | Independent · Day · 6th | Bedford, East of England | — ISI · Good |
| 289 | Rishworth School | 411 pupils | Independent · Boarding · 6th | Sowerby Bridge, Yorkshire and the Humber | — ISI · Good |
| 290 | Abbotsholme School | 220 pupils | Independent · Boarding · 6th | Uttoxeter, East Midlands | — ISI · Good |
| 291 | Meoncross School | 295 pupils | Independent · Day | Unknown, South East | — ISI · Good |
| 292 | Gosfield School | 368 pupils | Independent · Day · 6th | Unknown, East of England | — ISI · Good |
| 293 | Ditcham Park School | 415 pupils | Independent · Day | Petersfield, South East | — ISI · Good |
| 294 | Westbourne School | 322 pupils | Independent · Day | Unknown, Yorkshire and the Humber | — ISI · Good |
| 295 | Hall School Wimbledon | 206 pupils | Independent · Day · 6th | Unknown, London | — ISI · Good |
| 296 | OneSchool Global UK Colchester Campus | 131 pupils | Independent · Day · 6th | Colchester, East of England | — ISI · Good |
| 297 | St Joseph's College | 577 pupils | Independent · Boarding · 6th | Ipswich, East of England | — |
| 298 | Thorpe Hall School | 552 pupils | Independent · Day | Unknown, East of England | — ISI · Good |
| 299 | The Webber Independent School | 285 pupils | Independent · Day | Unknown, South East | — ISI · Good |
| 300 | Colchester Prep & High School | 281 pupils | Independent · Day | Colchester, East of England | — ISI · Good |