| Aldwickbury School | HARPENDEN Hertfordshire, AL5 1AD | Map | Website |
| Aylesbury Grammar School | AYLESBURY Buckinghamshire, HP21 7RP | Map | Website |
| Beaumont School | ST ALBANS Hertfordshire, AL4 0XB | Map | Website |
| Bedford Modern School | BEDFORD Bedfordshire, MK41 7NT | Map | Website |
| Berkhamsted School | BERKHAMSTED Hertfordshire, HP4 2BB | Map | Website |
| Bernards Heath Junior School | St Albans Hertfordshire, AL3 5HP | tbc | tbc |
| Brentwood School | BRENTWOOD Essex, CM15 8AS | Map | Website |
| Chauncy School | WARE Hertfordshire, SG12 0DP | Map | Website |
| Chesham Preparatory School | CHESHAM Buckinghamshire, HP5 3QF | Map | Website |
| Christ's College Finchley | LONDON Middlesex, N2 0SE | Map | Website |
| Claremont Fan Court School | ESHER Surrey, KT10 9LY | Map | Website |
| Culford School | BURY ST EDMUNDS Suffolk, IP28 6TX | Map | Website |
| Dame Alice Owens School | POTTERS BAR Hertfordshire, EN6 2DU | Map | Website |
| Fleetville Junior School | St Albans Hertfordshire, AL1 4LW | tbc | tbc |
| Garden Fields Junior Mixed and Infant School | St Albans Hertfordshire, AL3 5RL | tbc | tbc |
| Haberdashers' Elstree Schools | ELSTREE Hertfordshire, WD6 3AF | Map | Website |
| Heath Mount School | HERTFORD Hertfordshire, SG14 3NG | Map | Website |
| Highgate School | LONDON Middlesex, N6 4AY | Map | Website |
| Hitchin Boys' School | HITCHIN Hertfordshire, SG5 1JB | Map | Website |
| Kimbolton School | HUNTINGDON Cambridgeshire, PE28 0EA | Map | Website |
| Kingshott Preparatory School | HITCHIN Hertfordshire, SG4 7JX | Map | Website |
| Latymer Upper School | LONDON Greater London, W6 9LR | Map | Website |
| Lochinver House School | POTTERS BAR Hertfordshire, EN6 1LW | Map | Website |
| Lockers Park School | HEMEL HEMPSTEAD Hertfordshire, HP1 1TL | Map | Website |
| Manor Lodge School | SHENLEY Hertfordshire, WD7 9BG | Map | Website |
| Merchant Taylors' School, Northwood | NORTHWOOD Middlesex, HA6 2HT | Map | Website |
| Mill Hill & Belmont Schools | LONDON Middlesex, NW7 1QS | Map | Website |
| Northampton School for Boys | NORTHAMPTON Northamptonshire, NN1 5RT | Map | Website |
| Orley Farm School | HARROW-ON-THE-HILL Middlesex, HA1 3NU | Map | Website |
| Parmiter's School | WATFORD Hertfordshire, WD25 0UU | Map | Website |
| Queen Elizabeth's School, Barnet | BARNET Hertfordshire, EN5 4DQ | Map | Website |
| Queens School | WATFORD Hertfordshire, WD23 2TY | Map | Website |
| Radlett Preparatory School | RADLETT Hertfordshire, WD7 7LY | Map | Website |
| Reading Blue Coat School | READING Berkshire, RG4 6SU | Map | Website |
| Richard Hale School | HERTFORD Hertfordshire, SG13 8EN | Map | Website |
| Ridgeway Academy | WELWYN GARDEN CITY Hertfordshire, AL7 2AF | Map | Website |
| Robert Clack School | DAGENHAM Essex, RM8 1JU | Map | Website |
| Rooks Heath College | HARROW Middlesex, HA2 9AG | Map | Website |
| Roundwood Park School | HARPENDEN Hertfordshire, AL5 3AE | Map | Website |
| Samuel Ryder Academy | ST ALBANS Hertfordshire, AL1 5AR | Map | Website |
| Samuel Whitbread Academy | SHEFFORD Bedfordshire, SG17 5QS | Map | Website |
| Sandringham School | ST ALBANS Hertfordshire, AL4 9NX | Map | Website |
| St Albans High School for Girls | ST ALBANS Hertfordshire, AL1 3SJ | Map | Website |
| St Albans School | ST ALBANS Hertfordshire, AL3 4HB | Map | Website |
| St Aloysius' College | LONDON Middlesex, N6 5LY | Map | Website |
| St Benedict's School | LONDON Middlesex, W5 2ES | Map | Website |
| St Edmund's College, Ware | WARE Hertfordshire, SG11 1DS | Map | Website |
| St George's School, Harpenden | HARPENDEN Hertfordshire, AL5 4TD | Map | Website |
| St Margaret's School, Bushey | BUSHEY Hertfordshire, WD23 1DT | Map | Website |
| St Martin's School, Northwood | NORTHWOOD Middlesex, HA6 2DJ | Map | Website |
| St Peter's Collegiate School | WOLVERHAMPTON West Midlands, WV3 9DU | Map | Website |
| The John Lyon School | HARROW Middlesex, HA2 0HN | Map | Website |
| The Marlborough Science Academy | ST ALBANS Hertfordshire, AL1 2QA | Map | Website |
| The Oratory School | READING Oxfordshire, RG8 0PJ | Map | Website |
| The Perse School | CAMBRIDGE Cambridgeshire, CB2 8QF | Map | Website |
| The Totteridge Academy | LONDON Greater London, N20 8AZ | Map | Website |
| University College School (UCS) | LONDON Middlesex, NW3 6XH | Map | Website |
| Verulam School | ST ALBANS Hertfordshire, AL1 4PR | Map | Website |
| Wellington College | CROWTHORNE Berkshire, RG45 7PU | Map | Website |
| Wheatfields Junior Mixed School | St Albans Hertfordshire, AL4 9NT | tbc | tbc |
