| 26 | Elm Green Preparatory School | 175 pupils | Independent · Day | Essex, East of England | — ISI · Good |
| 27 | Ursuline Preparatory School | 169 pupils | Independent · Day | Brentwood, East of England | — ISI · Good |
| 28 | Maldon Court Preparatory School | 156 pupils | Independent · Day | Maldon, East of England | — ISI · Good |
| 29 | Oakwood Primary School | 153 pupils | Independent · Day | Luton, East of England | — ISI · Good |
| 30 | Loyola Preparatory School | 151 pupils | Independent · Day | BUCKHURST HILL, East of England | — ISI · Good |
| 31 | Howe Green House School | 142 pupils | Independent · Day | BISHOP'S STORTFORD, East of England | — ISI · Good |
| 32 | Hertford Prep | 137 pupils | Independent · Day | Hertford, East of England | — ISI · Good |
| 33 | Stormont School | 121 pupils | Independent · Day | Potters Bar, East of England | — ISI · Good |
| 34 | Daiglen School | 116 pupils | Independent · Day | Unknown, East of England | — ISI · Good |
| 35 | Saint Pierre School | 113 pupils | Independent · Day | Leigh-on-Sea, East of England | — ISI · Good |
| 36 | Heathcote School | 105 pupils | Independent · Day | Chelmsford, East of England | — ISI · Good |
| 37 | Woodlands School | 90 pupils | Independent · Day | Brentwood, East of England | — ISI · Good |
| 38 | Charlotte House Preparatory School | 89 pupils | Independent · Day | Rickmansworth, East of England | — ISI · Good |
| 39 | Orchard School & Nursery | 100 pupils | Independent · Day | Bedford, East of England | — ISI · Good |
| 40 | Mehria Primary School | Good | Independent · Day | Unknown, East of England | Good |
| 41 | Gurukula - The Hare Krishna Primary School | Good | Independent · Day | Hertfordshire, East of England | Good |
| 42 | Stanborough Primary School | Good | Independent · Day | Watford, East of England | Good |
| 43 | Include Suffolk | Good | Independent · Day | Lowestoft, East of England | Good |
| 44 | St John's College School | 405 pupils | Independent · Boarding | Cambridge, East of England | — |
| 45 | King's College School | 390 pupils | Independent · Boarding | Cambridge, East of England | — |
| 46 | Whitehall School | 118 pupils | Independent · Day | Huntingdon, East of England | — ISI · Unsatisfactory |
| 47 | St Faith's School | 553 pupils | Independent · Day | Cambridge, East of England | — |
| 48 | Town Close Co-Educational Preparatory School | 431 pupils | Independent · Day | Norwich, East of England | — |
| 49 | St Cedd's School | 341 pupils | Independent · Day | Chelmsford, East of England | — |
| 50 | St. Michael's School | 211 pupils | Independent · Day | Unknown, East of England | — |