| Acomb Primary School | YORK Yorkshire, YO24 4ES | Map | Website |
| ACS Egham International School | EGHAM Surrey, TW20 0HS | Map | Website |
| ACS International School Cobham | COBHAM Surrey, KT11 1BL | Map | Website |
| Aiglon College | CHESIÈRES-VILLARS Switzerland, 1885 | Map | Website |
| Aldenham School | BOREHAMWOOD Hertfordshire, WD6 3AJ | Map | Website |
| Altrincham Grammar School for Boys | ALTRINCHAM Cheshire, WA14 2RS | Map | Website |
| American School in London | LONDON Middlesex, NW8 0NP | Map | Website |
| Ampleforth College | YORK Yorkshire, YO62 4ER | Map | Website |
| Aquinas College | SALTER POINT Australia, WA 6152 | Map | Website |
| Ashford School | ASHFORD Kent, TN24 8PB | Map | Website |
| Ashville Harrogate | HARROGATE Yorkshire, HG2 9JP | Map | Website |
| Ballymena Academy | BALLYMENA Co. Antrim, BT42 1AJ | Map | Website |
| Barker College | NEW SOUTH WALES Australia, NSW 2077 | Map | Website |
| Berkhamsted School | BERKHAMSTED Hertfordshire, HP4 2BB | Map | Website |
| Berlin Metropolitan School | BERLIN Germany, 10115 | Map | Website |
| Birchwood High School | BISHOP'S STORTFORD Hertfordshire, CM23 5BD | Map | Website |
| Bohunt School Wokingham | ARBORFIELD Berkshire, RG2 9GB | Map | Website |
| Bolton School Girls' Division | BOLTON Lancashire, BL1 4PB | Map | Website |
| Bootham School | YORK Yorkshire, YO30 7BU | Map | Website |
| Brighton College | BRIGHTON Sussex, BN2 0AL | Map | Website |
| Brockhurst and Marlston House School | NEWBURY Berkshire, RG18 9UL | Map | Website |
| Carrington School | REDHILL Surrey, RH1 4AD | Map | Website |
| Charles Darwin School | WESTERHAM Kent, TN16 3AU | Map | Website |
| Clayesmore School | BLANDFORD FORUM Dorset, DT11 8LL | Map | Website |
| Cleeve School | CHELTENHAM Gloucestershire, GL52 8AE | Map | Website |
| Downe House Muscat | MUSCAT Oman, | tbc | Website |
| Dulwich College | LONDON Surrey, SE21 7LD | Map | Website |
| Eastbourne College | EASTBOURNE Sussex, BN21 4JX | Map | Website |
| Epsom College in Malaysia | NEGERI SEMBILAN DARUL KHUSUS Malaysia, | Map | Website |
| Ernest Bevin College | LONDON Surrey, SW17 7DF | Map | Website |
| Felsted School | DUNMOW Essex, CM6 3LL | Map | Website |
| Framlingham College | WOODBRIDGE Suffolk, IP13 9EY | Map | Website |
| George Watson's College | EDINBURGH Midlothian, EH10 5EG | Map | Website |
| Giggleswick School | SETTLE Yorkshire, BD24 0DE | Map | Website |
| Gordon's School | WOKING Surrey, GU24 9PT | Map | Website |
| Graveney School | LONDON Middlesex, SW17 9BU | Map | Website |
| Grey High School | PORT ELIZABETH 6001 Eastern Cape, | Map | Website |
| Gulf English School Kuwait | KUWAIT CITY Kuwait, | Map | Website |
| Hilton College | HILTON KwaZulu-Natal, | Map | Website |
| Hurstpierpoint College | HASSOCKS Sussex, BN6 9JS | Map | Website |
| Immanuel College | BUSHEY Hertfordshire, WD23 4EB | Map | Website |
| King Edward VI Five Ways School | BIRMINGHAM West Midlands, B32 4BT | Map | Website |
| King Faisal School | RIYADH Saudi Arabia, 11614 | tbc | Website |
| King's College School (KCS), Wimbledon | LONDON Surrey, SW19 4TT | Map | Website |
| Marling School | STROUD Gloucestershire, GL5 4HE | Map | Website |
| Millfield School | STREET Somerset, BA16 0YD | Map | Website |
| Mount St Mary's College | SHEFFIELD Derbyshire, S21 3YL | Map | Website |
| Newport High School | NEWPORT South Wales, NP20 7YB | Map | Website |
| Northampton School for Girls | NORTHAMPTON Northamptonshire, NN3 6DG | Map | Website |
| Oundle School | PETERBOROUGH Northamptonshire, PE8 4GH | Map | Website |
| Pennthorpe School | RUDGWICK Sussex, RH12 3HJ | Map | Website |
| Rangitoto College | AUCKLAND New Zealand, 0630 | Map | Website |
| Rikkyo School in England | HORSHAM Sussex, RH12 3BE | Map | Website |
| Rokeby School, Surrey | KINGSTON UPON THAMES Surrey, KT2 7PB | Map | Website |
| Samuel Ryder Academy | ST ALBANS Hertfordshire, AL1 5AR | Map | Website |
| Sandringham School | ST ALBANS Hertfordshire, AL4 9NX | Map | Website |
| St Alban's College, Pretoria | PRETORIA Gauteng, | Map | Website |
| St George's International School | LUXEMBOURG Luxembourg, L-2328 | Map | Website |
| St Joseph's Institution International (SJII) | Singapore, 318876 | Map | Website |
| St Katherine's School | BRISTOL Avon, BS20 0HU | Map | Website |
| St Mary's School Ascot | ASCOT Berkshire, SL5 9JF | Map | Website |
| St Matthew Academy | LONDON Greater London, SE3 0XX | Map | Website |
| Tanglin Trust School (TTS) | Singapore, 139299 | Map | Website |
| The British School in the Netherlands | VOORSCHOTEN Netherlands, | Map | Website |
| The King's School, Chester | CHESTER Cheshire, CH4 7QL | Map | Website |
| The Scots College | NEW SOUTH WALES Australia, 2023 | Map | Website |
| The Southport School | SOUTHPORT Australia, QLD 4215 | Map | Website |
| Townley Grammar School for Girls | BEXLEYHEATH Kent, DA6 7AB | Map | Website |
| Umhlali Preparatory School | KWAZULU NATAL South Africa, | Map | Website |
| Victoria College | ST HELIER Jersey, JE1 4HT | Map | Website |
| Warwick School | WARWICK Warwickshire, CV34 6PP | Map | Website |
| Wells Cathedral School | WELLS Somerset, BA5 2ST | Map | Website |
| Wesley College | SOUTH PERTH Australia, WA 6151 | Map | Website |
| Wynberg Boys High School | WYNBERG Western Cape, | Map | Website |
