| 26 | Hatherop Castle School | 280 pupils | Independent · Boarding | Gloucestershire, South West | — ISI · Good |
| 27 | Millfield Preparatory School | 471 pupils | Independent · Boarding | Glastonbury, South West | — ISI · Excellent |
| 28 | Hazlegrove Preparatory School | 377 pupils | Independent · Boarding | Yeovil, South West | — ISI · Excellent |
| 29 | West Hill Park School | 201 pupils | Independent · Boarding | Fareham, South East | — ISI · Excellent |
| 30 | Heath Mount School | 505 pupils | Independent · Boarding | Hertford, East of England | — ISI · Good |
| 31 | Edgeborough School | 359 pupils | Independent · Boarding | Farnham, South East | — ISI · Good |
| 32 | Amesbury School | 350 pupils | Independent · Boarding | Unknown, South East | — ISI · Good |
| 33 | Winchester House School | 338 pupils | Independent · Boarding | Unknown, East Midlands | — ISI · Good |
| 34 | Brockhurst and Marlston House Schools | 323 pupils | Independent · Boarding | Thatcham, South East | — ISI · Good |
| 35 | Prestfelde School | 322 pupils | Independent · Boarding | Shrewsbury, West Midlands | — ISI · Good |
| 36 | Port Regis Preparatory School | 317 pupils | Independent · Boarding | Shaftesbury, South West | — ISI · Good |
| 37 | Swanbourne House School | 309 pupils | Independent · Boarding | Milton Keynes, South East | — ISI · Good |
| 38 | Elstree School | 307 pupils | Independent · Boarding | Reading, South East | — ISI · Good |
| 39 | Bede's Prep School | 295 pupils | Independent · Boarding | Eastbourne, South East | — ISI · Good |
| 40 | Oratory Preparatory School | 292 pupils | Independent · Boarding | Unknown, South East | — ISI · Good |
| 41 | Ashfold School | 265 pupils | Independent · Boarding | Aylesbury, South East | — ISI · Good |
| 42 | King's College Prep | 265 pupils | Independent · Boarding | Taunton, South West | — ISI · Good |
| 43 | Farleigh School | 448 pupils | Independent · Boarding | Andover, South East | — ISI · Good |
| 44 | All Hallows School | 248 pupils | Independent · Boarding | Shepton Mallet, South West | — ISI · Good |
| 45 | Brighton College Prep Handcross | 431 pupils | Independent · Boarding | Haywards Heath, South East | — ISI · Good |
| 46 | Terra Nova School | 242 pupils | Independent · Boarding | Crewe, North West | — ISI · Good |
| 47 | Barnardiston Hall Preparatory School | 232 pupils | Independent · Boarding | Haverhill, East of England | — ISI · Good |
| 48 | Mowden Hall School | 227 pupils | Independent · Boarding | Stocksfield, North East | — ISI · Good |
| 49 | Repton Preparatory School | 399 pupils | Independent · Boarding | Derby, East Midlands | — ISI · Good |
| 50 | Wellington College Prep | 387 pupils | Independent · Boarding | Sandhurst, South East | — ISI · Good |