| Aboyne Lodge Junior Mixed & Infant School | St Albans Hertfordshire, AL3 5NL | tbc | tbc |
| Aldwickbury School | HARPENDEN Hertfordshire, AL5 1AD | Map | Website |
| Ashlyns School | BERKHAMSTED Hertfordshire, HP4 3AH | 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 |
| Bishop's Stortford High School | BISHOP'S STORTFORD Hertfordshire, CM23 3LU | Map | Website |
| Bushey Meads School (BMS) | BUSHEY Hertfordshire, WD23 4PA | Map | Website |
| Charterhouse | GODALMING Surrey, GU7 2DX | Map | Website |
| City of London School | LONDON Greater London, EC4V 3AL | Map | Website |
| Dame Alice Owens School | POTTERS BAR Hertfordshire, EN6 2DU | Map | Website |
| Dr Challoner's Grammar School | AMERSHAM Buckinghamshire, HP6 5HA | Map | Website |
| Fleetville Junior School | St Albans Hertfordshire, AL1 4LW | tbc | tbc |
| Freman College | BUNTINGFORD Hertfordshire, SG9 9BT | Map | Website |
| Haileybury | HERTFORD Hertfordshire, SG13 7NU | Map | Website |
| Heath Mount School | HERTFORD Hertfordshire, SG14 3NG | Map | Website |
| Highgate School | LONDON Middlesex, N6 4AY | Map | Website |
| Killigrew Junior School | St Albans Hertfordshire, AL2 3HD | tbc | tbc |
| Kingshott Preparatory School | HITCHIN Hertfordshire, SG4 7JX | Map | Website |
| Lancing College | LANCING Sussex, BN15 0RW | Map | Website |
| Latymer Upper School | LONDON Greater London, W6 9LR | Map | Website |
| Lincroft Academy | BEDFORD Bedfordshire, MK43 7RE | Map | Website |
| Lochinver House School | POTTERS BAR Hertfordshire, EN6 1LW | Map | Website |
| Lockers Park School | HEMEL HEMPSTEAD Hertfordshire, HP1 1TL | Map | Website |
| Longdean School | HEMEL HEMPSTEAD Hertfordshire, HP3 8JB | 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 |
| Millfield School | STREET Somerset, BA16 0YD | Map | Website |
| Onslow St Audrey's School | HATFIELD Hertfordshire, AL10 8AB | Map | Website |
| Oswestry School | OSWESTRY Shropshire, SY11 2TL | 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 |
| Richard Hale School | HERTFORD Hertfordshire, SG13 8EN | Map | Website |
| Roundwood Park School | HARPENDEN Hertfordshire, AL5 3AE | Map | Website |
| Sandringham School | ST ALBANS Hertfordshire, AL4 9NX | Map | Website |
| Simon Balle School | HERTFORD Hertfordshire, SG13 8AJ | Map | Website |
| Sir Frederic Osborn School | WELWYN GARDEN CITY Hertfordshire, AL7 2AF | Map | Website |
| St Albans School | ST ALBANS Hertfordshire, AL3 4HB | 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 Martin's School, Northwood | NORTHWOOD Middlesex, HA6 2DJ | Map | Website |
| The Haberdashers' Aske's Boys' School | ELSTREE Hertfordshire, WD6 3AF | 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 |
| Thornton College | MILTON KEYNES Buckinghamshire, MK17 0HJ | Map | Website |
| Tring School | TRING Hertfordshire, HP23 5JD | Map | Website |
| University College School (UCS) | LONDON Middlesex, NW3 6XH | Map | Website |
| Watford Grammar School for Boys | WATFORD Hertfordshire, WD18 7JF | Map | Website |
| Wellingborough School | WELLINGBOROUGH Northamptonshire, NN8 2BX | Map | Website |
| Westbrook Hay Preparatory School | HEMEL HEMPSTEAD Hertfordshire, HP1 2RF | Map | Website |
| Wetherby Senior School | LONDON Greater London, W1U 2QB | Map | Website |
| Wheatfields Junior Mixed School | St Albans Hertfordshire, AL4 9NT | tbc | tbc |
| Winchester College | WINCHESTER Hampshire, SO23 9NA | Map | Website |
