| Aldenham School | BOREHAMWOOD Hertfordshire, WD6 3AJ | Map | Website |
| Avon House | WOODFORD GREEN Essex, IG8 0PN | Map | Website |
| Beaumont School | ST ALBANS Hertfordshire, AL4 0XB | Map | Website |
| Berkhamsted School | BERKHAMSTED Hertfordshire, HP4 2BB | Map | Website |
| Bishop's Stortford College | BISHOP'S STORTFORD Hertfordshire, CM23 2PJ | Map | Website |
| Brentwood School | BRENTWOOD Essex, CM15 8AS | Map | Website |
| Chauncy School | WARE Hertfordshire, SG12 0DP | Map | Website |
| Chigwell School | CHIGWELL Essex, IG7 6QF | Map | Website |
| Dame Alice Owens School | POTTERS BAR Hertfordshire, EN6 2DU | Map | Website |
| Enfield Grammar School | ENFIELD Middlesex, EN2 6LN | Map | Website |
| Forest School | LONDON Greater London, E17 3PY | Map | Website |
| Haileybury | HERTFORD Hertfordshire, SG13 7NU | Map | Website |
| Heath Mount School | HERTFORD Hertfordshire, SG14 3NG | Map | Website |
| Hockerill Anglo-European College | BISHOPS STORTFORD Hertfordshire, CM23 5HX | Map | Website |
| Ipswich School | IPSWICH Suffolk, IP1 3SG | Map | Website |
| Joyce Frankland Academy | SAFFRON WALDEN Essex, CB11 3TR | Map | Website |
| Latymer Upper School | LONDON Greater London, W6 9LR | Map | Website |
| Lingfield College | LINGFIELD Surrey, RH7 6PN | Map | Website |
| Longdean School | HEMEL HEMPSTEAD Hertfordshire, HP3 8JB | Map | Website |
| Loyola Preparatory School | BUCKHURST HILL Essex, IG9 5NH | Map | Website |
| Mill Hill & Belmont Schools | LONDON Middlesex, NW7 1QS | Map | Website |
| Monks Walk School | WELWYN GARDEN CITY Hertfordshire, AL8 7NL | Map | Website |
| Mount Grace School | POTTERS BAR Hertfordshire, EN6 1EZ | Map | Website |
| New Hall School | CHELMSFORD Essex, CM3 3HS | Map | Website |
| Oundle School | PETERBOROUGH Northamptonshire, PE8 4GH | Map | Website |
| Parmiter's School | WATFORD Hertfordshire, WD25 0UU | Map | Website |
| Putney High School | LONDON Surrey, SW15 6BH | Map | Website |
| Queen Elizabeth's School, Barnet | BARNET Hertfordshire, EN5 4DQ | Map | Website |
| Queenswood School | HATFIELD Hertfordshire, AL9 6NS | Map | Website |
| Richard Hale School | HERTFORD Hertfordshire, SG13 8EN | Map | Website |
| Rickmansworth School | RICKMANSWORTH Hertfordshire, WD3 3AQ | Map | Website |
| Roundwood Park School | HARPENDEN Hertfordshire, AL5 3AE | Map | Website |
| Saffron Walden County High School | SAFFRON WALDEN Essex, CB11 4UH | Map | Website |
| Saint Nicholas School | OLD HARLOW Essex, CM17 0NJ | Map | Website |
| Sandringham School | ST ALBANS Hertfordshire, AL4 9NX | Map | Website |
| South Hampstead High School | LONDON Greater London, NW3 5SS | Map | Website |
| St Albans Girls' School | ST ALBANS Hertfordshire, AL3 6DB | Map | Website |
| St Columba's College | ST ALBANS Hertfordshire, AL3 4AW | Map | Website |
| St Ignatius College, Enfield | ENFIELD Middlesex, EN1 4NP | Map | Website |
| The Broxbourne School | BROXBOURNE Hertfordshire, EN10 7DD | Map | Website |
| The Haberdashers' Aske's Boys' School | ELSTREE Hertfordshire, WD6 3AF | Map | Website |
| The Leventhorpe | SAWBRIDGEWORTH Hertfordshire, CM21 9BY | Map | Website |
| The Leys School | CAMBRIDGE Cambridgeshire, CB2 7AD | Map | Website |
| The Royal Masonic School for Girls | RICKMANSWORTH Hertfordshire, WD3 4HF | Map | Website |
| Tiffin School | KINGSTON-UPON-THAMES Surrey, KT2 6RL | Map | Website |
| University College School (UCS) | LONDON Middlesex, NW3 6XH | Map | Website |
| Wellingborough School | WELLINGBOROUGH Northamptonshire, NN8 2BX | Map | Website |
| Westcliff High School For Boys | WESTCLIFF-ON-SEA Essex, SS0 0BP | Map | Website |
| Woodford Green Preparatory School | WOODFORD GREEN Essex, IG8 0BZ | Map | Website |
| Woodlands School | Scarborough Yorkshire, YO12 6QN | tbc | tbc |
