| Aldenham School | BOREHAMWOOD Hertfordshire, WD6 3AJ | Map | Website |
| Alleyn's School | DULWICH London, SE22 8SU | Map | Website |
| American School in London | LONDON Middlesex, NW8 0NP | Map | Website |
| Bedford Modern School | BEDFORD Bedfordshire, MK41 7NT | Map | Website |
| Berkhamsted School | BERKHAMSTED Hertfordshire, HP4 2BB | Map | Website |
| Box Hill School | DORKING Surrey, RH5 6EA | Map | Website |
| Brighton College | BRIGHTON Sussex, BN2 0AL | Map | Website |
| Canons High School | EDGWARE Middlesex, HA8 6AN | Map | Website |
| Chigwell School | CHIGWELL Essex, IG7 6QF | Map | Website |
| Dr Challoner's Grammar School | AMERSHAM Buckinghamshire, HP6 5HA | Map | Website |
| Durston House | LONDON Middlesex, W5 2DR | Map | Website |
| Enfield Grammar School | ENFIELD Middlesex, EN2 6LN | Map | Website |
| Forest School | LONDON Greater London, E17 3PY | Map | Website |
| Haberdashers' Elstree Schools | ELSTREE Hertfordshire, WD6 3AF | Map | Website |
| Hampton School | HAMPTON Middlesex, TW12 3HD | Map | Website |
| Harrow School | HARROW-ON-THE-HILL Middlesex, HA1 3HP | Map | Website |
| Hatch End High School | HARROW Middlesex, HA3 6NR | Map | Website |
| Highgate School | LONDON Middlesex, N6 4AY | Map | Website |
| Ibstock Place School | LONDON Surrey, SW15 5PY | Map | Website |
| Isleworth and Syon School | ISLEWORTH Middlesex, TW7 5LJ | Map | Website |
| Kew House School | BRENTFORD Middlesex, TW8 0EX | Map | Website |
| Kimbolton School | HUNTINGDON Cambridgeshire, PE28 0EA | Map | Website |
| King Edward's Witley | GODALMING Surrey, GU8 5SG | Map | Website |
| King's College School (KCS), Wimbledon | LONDON Surrey, SW19 4TT | Map | Website |
| Latymer Upper School | LONDON Greater London, W6 9LR | Map | Website |
| Merchant Taylors' School, Northwood | NORTHWOOD Middlesex, HA6 2HT | Map | Website |
| Mill Hill & Belmont Schools | LONDON Middlesex, NW7 1QS | Map | Website |
| Orley Farm School | HARROW-ON-THE-HILL Middlesex, HA1 3NU | Map | Website |
| Park High School, Stanmore | STANMORE Middlesex, HA7 1PL | Map | Website |
| Radnor House Twickenham | TWICKENHAM Middlesex, TW1 4QG | Map | Website |
| RGS, High Wycombe | HIGH WYCOMBE Buckinghamshire, HP13 6QT | Map | Website |
| Rooks Heath College | HARROW Middlesex, HA2 9AG | Map | Website |
| Sacred Heart Language College | HARROW Middlesex, HA3 7AY | Map | Website |
| Salvatorian College | HARROW WEALD Middlesex, HA3 5DY | Map | Website |
| Sir William Borlase's Grammar School | MARLOW Buckinghamshire, SL7 2BR | Map | Website |
| St Benedict's School | LONDON Middlesex, W5 2ES | Map | Website |
| St Clare's School | OXFORD Oxfordshire, OX2 7AL | Map | Website |
| St Columba's College | ST ALBANS Hertfordshire, AL3 4AW | Map | Website |
| St John's School, Northwood | NORTHWOOD Middlesex, HA6 3QY | Map | Website |
| St Martin's School, Northwood | NORTHWOOD Middlesex, HA6 2DJ | Map | Website |
| St Paul's Girls' School | LONDON Middlesex, W6 7BS | Map | Website |
| The Forty Club | RAMSGATE Kent, CT12 4AJ | tbc | Website |
| The Harrodian School | LONDON Middlesex, SW13 9QN | Map | Website |
| University College School (UCS) | LONDON Middlesex, NW3 6XH | Map | Website |
| Watford Grammar School for Boys | WATFORD Hertfordshire, WD18 7JF | Map | Website |
| Westminster School | LONDON Middlesex, SW1P 3PF | Map | Website |
| Wetherby Senior School | LONDON Greater London, W1U 2QB | Map | Website |
| Whitmore High School | HARROW Middlesex, HA2 0AD | Map | Website |
| Wilson's School | WALLINGTON Surrey, SM6 9JW | Map | Website |
